A) 1. C

2. D

3. A

4. A

5. C

6. B

7. C

B) 1. launched

2. investors

3. signs

C) 1. used

2. use to

3.were studying

4. had finished

5. was surfing

6. went

7. hadn't taken

8. did

9. were going

10. had seen

11. had been waiting