giúp mình làm hết nha mọi người

Ex8 :

1. Have you ever met

B: sot

2. A : did you start

B : have recently completed / asked

3. A : saw

B : have already seen

4. A : Work

B : started

Ex9 : 

1. was having

2. travels

3. haven't begun

4. is running

5. invited/ didn't come

6. is cleaning

7. has begun

8. makes

9. is cooking

10. going

11. haven't seen / left

12 . is / playing

13. left

14. has been