Chia động từ trong ngoặc ra thì simple past hoặc present perfect:
1 We (study) ..............are very hard lesson the day before yesterday
2 We (study)...........almost every lesson in this book so far
3 We never (watch).............that television progam
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 several 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
1. Studied 2. Have studied
3. Have watched 4. Watched
5. have traveled 6. traveled
7. have read 8. had
9. had 10. have had
1. have studied
2. giống câu 1
3 have never watched
4. watched
5. have travelled
6. travelled
7. have read
8. read
9. had
10. have had