> 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)........
3) We (never watch).............
4) We (watch).........
5) My wife and I.......
6) My wife and I (travel).......
7) I (read)...................that novel by Hemingway sevaral times before.
8) I (read)......
that novel again during my last vacation.
little trouble with my car last week.
............almost every lesson in this book so far.…...........
.......that television program......
.....an interesting program on television last night......
........(travel) by air many times in the past
....... to Mexico by air last summer