Bài 2: Chọn từ thích hợp:
1. are having
2. has just left
3. haven't caught
4. is still reading
5. have you ever tried
6. is having
7. takes off
8. is
9. have read
10. has always been
11. are you always talking
12. do you do
13. is pouring
14. am working
15. is sleeping