51. You (receive)………………….any letter from your parents yet? 52. My brother (join)…
51. You (receive)………………….any letter from your parents yet? 52. My brother (join)… 51. You (receive)………………….any letter from your parents yet? 52. My brother (join)…………the army when he (be)……….young. 53. I (see)……. a car accident while I (wait)………..for you at this corner yesterday. 54. Mr.John (be)………..principal of our school since last year. 55. Mr. Smith (teach)…………….at … Đọc tiếp