Ex9 :

1. have you done

2. has been 

3. have worked

4. Have you had

5. have provided

6. has recently offered

7. have you worked

8. have you done

9. have already finished

10. has told

11. hasn't found

12. have looked

13. has also planned

14. have planned

15. haven't decided

Ex10 :

1. went

    haven't had

2. used to live

    was

    met

3. has worked

4. had

5. has met

    went

6. has just phoned

    said

    couldn't 

7. have already read

    finished

8. felt

    took

    has been

Ex11 :

1. B

2. C

3. C

4. B

5. B

6. C

7. A

8. C

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Ex 4

1. have you done

2. has been 

3. have worked

4. Have you had

5. have provided

6. has recently offered

7. have you worked

8. have you done

9. have already finished

10. has told

11. hasn't found

12. have looked

13. has also planned

14. have planned

15. haven't decided

Ex 10

1. went/ haven't had

2. used to live/ was/ met

3. has worked

4. had

5. has met/ went

6. has just phoned/ said/ couldn't 

7. have already read/ finished

8. felt/ took/ has been

Ex 11:

1. B

2. C

3. C

4. B

5. B

6. C

7. A

8. C