Bài 2: Chia động từ trong ngoặc ra thì Quá khứ đơn hoặc thì Hiện tại hoàn thành:
1. studied
2. have studied
3. have watched
4. Did you watch
5. have travelled
6. travelled
7. Have you read
8. read
9. had
10. had
11. haven't worked/ finished
12. Did ... watch
13. Have Mary and Paul traveled
14. haven't gone
15. ate
#chuchoctot
Xin hay nhất ạ!!!