BÀI TẬP:

(19)………………….the nineteenth century,people found a way to use natural gas for heating and cooking,and it was a very important(20)………………At frist,people thought that natural gas was useless,(21)………eventually they found out that it was very valuable.From the early 19th to 20th centuries,natural gas was primarily used to power lights in buildings and on streets.Today,mordern technology has allowed us (22)…………….the uses of natural gas.More than half of American homes use natural gas to provide heat,hot water and fuel for cooking .Natural gas is a quite afforable fuel,which makes it a good option for homeowners.It is also a (23)…………. type of fuel than coal,petrol and disel as it has less carbon dioxide emissions and it better for the enviroment .It is also lighter and can be (24)………..transported via ships ,tankers and pipes

19:
A.Between B.on C.through D.during
20:
A.invention B.consumption C.formation D.discovery
21:
A.so B.because C.but D.and
22:
A.expand B.to expand C.expanding D.expanded
23:
A.cleaner B.friendlier C.more offical D.more profitable
24:
A.easier B.friendlier C.ease D.easy

Chúng ta sẽ đi vào từng câu hỏi cụ thể:

CÂU 19:

Chúng ta cần điền một giới từ thích hợp vào chỗ trống trước cụm “the nineteenth century” (thế kỷ 19). Câu này nói về việc “vào thế kỷ 19, người ta đã tìm ra cách sử dụng khí tự nhiên…”.

Phân tích các lựa chọn:
A. Between: Dùng để chỉ sự vật ở giữa hai đối tượng khác. Không phù hợp.
B. On: Thường dùng với ngày tháng cụ thể, hoặc bề mặt. Không phù hợp với một khoảng thời gian dài như thế kỷ.
C. Through: Chỉ sự xuyên suốt, qua một giai đoạn. Có thể dùng được trong một số trường hợp, nhưng không phải là lựa chọn tốt nhất.
D. During: Có nghĩa là “trong suốt, trong khoảng thời gian”. Đây là giới từ chỉ thời gian phổ biến nhất và phù hợp nhất để diễn tả một sự kiện xảy ra trong một khoảng thời gian nhất định như thế kỷ.

Do đó, đáp án chính xác cho câu 19 là D. during.

CÂU 20:

Chỗ trống này cần một danh từ để bổ nghĩa cho cụm “a very important (20)……………….”. Câu trước đó nói về việc “người ta tìm ra cách sử dụng khí tự nhiên”. Sự tìm ra này là một sự kiện quan trọng.

Phân tích các lựa chọn:
A. Invention: Sự phát minh. Khí tự nhiên đã tồn tại, con người chỉ tìm ra cách sử dụng nó, nên không hoàn toàn là phát minh.
B. Consumption: Sự tiêu thụ. Không hợp với ngữ cảnh.
C. Formation: Sự hình thành. Không hợp với ngữ cảnh.
D. Discovery: Sự khám phá, phát hiện. Đây là từ phù hợp nhất để chỉ việc con người tìm ra một thứ gì đó có giá trị, trong trường hợp này là cách sử dụng khí tự nhiên.

Do đó, đáp án chính xác cho câu 20 là D. discovery.

CÂU 21:

Câu này có cấu trúc: “At first, people thought that natural gas was useless, (21) ……… eventually they found out that it was very valuable.” (Ban đầu, người ta nghĩ khí tự nhiên vô dụng, (21) ……… cuối cùng họ nhận ra nó rất có giá trị).

Đây là sự đối lập giữa hai ý: ban đầu vô dụng, nhưng sau đó lại có giá trị.

Phân tích các lựa chọn:
A. So: Vì vậy, cho nên. Diễn tả kết quả.
B. Because: Bởi vì. Diễn tả nguyên nhân.
C. But: Nhưng. Diễn tả sự đối lập, tương phản.
D. And: Và. Diễn tả sự nối tiếp, thêm vào.

Từ “but” (nhưng) thể hiện rõ sự đối lập giữa hai vế câu.

Do đó, đáp án chính xác cho câu 21 là C. but.

CÂU 22:

Câu này có cấu trúc: “Today, modern technology has allowed us (22) ……… the uses of natural gas.” (Ngày nay, công nghệ hiện đại đã cho phép chúng ta (22) ……… các công dụng của khí tự nhiên).

Cấu trúc “allow someone to do something” là cấu trúc rất phổ biến trong Tiếng Anh, có nghĩa là “cho phép ai đó làm gì đó”.

Phân tích các lựa chọn:
A. Expand: Động từ nguyên mẫu. Sai cấu trúc.
B. To expand: Động từ nguyên mẫu có “to”. Phù hợp với cấu trúc “allow someone to do something”.
C. Expanding: V-ing. Sai cấu trúc.
D. Expanded: Động từ ở dạng quá khứ phân từ. Sai cấu trúc.

Do đó, đáp án chính xác cho câu 22 là B. to expand.

CÂU 23:

Câu này có cấu trúc so sánh: “It is also a (23) ………… type of fuel than coal, petrol and diesel…” (Nó cũng là một loại nhiên liệu (23) ………… hơn than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than_than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than than—“. This is a comparative sentence structure. We need to fill in the blank with a comparative adjective.
A. Cleaner: Nghĩa là “sạch hơn”.
B. Friendlier: Nghĩa là “thân thiện hơn”. Dù khí tự nhiên có thể được xem là “thân thiện với môi trường hơn”, nhưng khi so sánh “type of fuel” (loại nhiên liệu), “cleaner” (sạch hơn) là từ mang tính kỹ thuật và đúng ngữ cảnh hơn trong việc đánh giá mức độ tác động đến môi trường.
C. More official: Nghĩa là “chính thức hơn”. Không hợp ngữ cảnh.
D. More profitable: Nghĩa là “có lợi hơn”. Không hợp ngữ cảnh so sánh về môi trường.

Vì câu văn nói về việc “less carbon dioxide emissions” (ít khí thải carbon dioxide hơn) và “better for the environment” (tốt hơn cho môi trường), nên “cleaner” (sạch hơn) là từ so sánh phù hợp nhất.

Do đó, đáp án chính xác cho câu 23 là A. cleaner.

CÂU 24:

Câu này có cấu trúc: “It is also lighter and can be (24) ……….. transported via ships, tankers and pipes.” (Nó cũng nhẹ hơn và có thể được vận chuyển (24) ……….. qua tàu, xe chở dầu và ống dẫn).

Chúng ta cần một trạng từ bổ nghĩa cho động từ “transported” (vận chuyển).

Phân tích các lựa chọn:
A. Easier: Dạng so sánh hơn của tính từ “easy” (dễ). Ta cần một trạng từ để bổ nghĩa cho động từ.
B. Friendlier: Dạng so sánh hơn của tính từ “friendly” (thân thiện). Không hợp ngữ cảnh.
C. Ease: Danh từ (sự dễ dàng). Không hợp ngữ cảnh.
D. Easy: Tính từ (dễ). Ta cần trạng từ. Tuy nhiên, trong một số trường hợp, “easy” có thể đóng vai trò như một trạng từ. Nhưng để rõ ràng hơn, chúng ta nên tìm trạng từ. Trong trường hợp này, “easier” (dễ dàng hơn) có thể hiểu là “một cách dễ dàng hơn”.

Tuy nhiên, khi xem xét kỹ các lựa chọn và ngữ cảnh câu “can be … transported”, ta nhận thấy một cấu trúc phổ biến là “can be + tính từ + transported” khi tính từ bổ nghĩa cho đối tượng được vận chuyển (tức là khí tự nhiên), hoặc “can be + trạng từ + transported” khi trạng từ bổ nghĩa cho hành động vận chuyển.

Xem lại các đáp án:
A. Easier: Đây là dạng so sánh hơn của tính từ “easy”. Nó có thể bổ nghĩa cho “transported” theo cách “can be transported easier”.
B. Friendlier: Không hợp.
C. Ease: Danh từ, không thể đứng trước “transported”.
D. Easy: Tính từ.

Trong ngữ cảnh này, chúng ta có thể hiểu là “có thể được vận chuyển một cách dễ dàng hơn”. Vậy “easier” (dạng so sánh hơn của “easy”) là lựa chọn hợp lý nhất để bổ nghĩa cho “transported” theo cách diễn đạt so sánh với các nhiên liệu khác. Mặc dù theo ngữ pháp chặt chẽ, một trạng từ như “easily” sẽ hoàn hảo hơn, nhưng trong các lựa chọn đưa ra, “easier” là gần nhất và hợp lý nhất để diễn tả sự thuận tiện hơn trong vận chuyển.

Do đó, đáp án chính xác cho câu 24 là A. easier.

Tóm lại đáp án của chúng ta là:

19. D. during
20. D. discovery
21. C. but
22. B. to expand
23. A. cleaner
24. A. easier

Chúc các em học tốt và luôn giữ vững niềm đam mê với môn Tiếng Anh nhé!