Ответ:

ex C

1. Where were you

I was

2. were

3. was

4. weren't

ex D

1. saw

2. had

3. ate

4. cooked

5. left

6. walked

7. visited

8. made

9. traveled

10. bought

11. knew

12. swam

ex E

1. Did you go

went

2. found

took

3. didn't want

stayed

watched

4. did you wear

wore

ex F

1. so

2. because

3. so

4. but