Exercise8 Chia các động từ trong ngoặc ra thì simple past (quá khứ thường) hoặc present perfect (hiện tại hoàn thành): 1) We (study) ……………a very hard lesson the day before yesterday. 2) We (study) …………………………………almost every lesson in this book so far. 3) We (never/watch)……………………..that television program. 4) We (watch) ……………......an interesting program on television last night. 5) My wife and I …………………………….……(travel) by air many times in the past 6) My wife and I (travel)………………................ to Mexico by air last summer 7) I (read) ………………that novel by Hemingway sevaral times before. 8) I (read) …………………….that novel again during my last vacation . 9) I (have) …………………….a little trouble with my car last week. 10) However,I (have )……………………. no trouble with my car since then. 11) I (have ) ………………..this toy since my birthday. 12) We (live )………………….in HN for ten years now and like it a lot. 13) The last time I (go) ……………………to HN was in May 14) When my parents were on holiday I ( stay)……………… with my aunt for a week 15) I (not/ see ) my son for ages .He (not visit ) ……………………..me since May 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