Chia các động từ trong ngoặc ra thì simple past hoặc present perfect:
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 (had).........................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