Mn ơi em cần gấp 3. Chia các động từ trong ngoặc ra thì simple past hoặc present perfect: 16) Tom ( be) …………….to HN twice .He loves it very much 17) My sister (work ) ……………………for an enterprise for two years .That was after college 18) I (move)……………… to HN in 2001 .I (be ) ………….there a long time now 19) It was so cold today that I (wear)…………… a sweater at school 20) So far this month there (be )……………………. three robberies in this street 21) When I was young I (meet )…………..him three times 22) In the past few years ,it (become )………….. more and more difficult to get into university 23) I (feel )………………better since I ( live) ……………….here 24) Since I (be ) ……………………in this city I ( not see)…………… him