Here are the best answers for each question:

**Question 9:** I will never forget **B. work** with Tom. We had a wonderful time together.

**Question 10:** They should write an outline for their presentation, **A. should they**?

**Question 11:** The results of a recent study greatly **D. blazed** teenagers' current preferences for leisure activities.

**Question 12:** When I came to his house, he **B. has watched** a football match on TV.

**Question 13:** He got a heavy **A. fine** for breaking the traffic regulations yesterday.

So the answers are:
9. B
10. A
11. D
12. B
13. A