2. 解析：选A。promote表示“晋升”。

5. Costs directly relate to the time spent on the project.

4. There are three hundred students, whose ages range from fifteen to eighteen.

3. As a doctor, he devoted himself to researching the cause of AIDS body and soul.

2. In some cases, I will support your opinion.

5. was broken into

15. -May I take your order now?

-_______.

A. No, I’m in trouble now.

B. Yes, we obey orders

C. Yes, I’d like a dish of chicken

D. No, I don’t have a choice of meat

14. _______ with a difficult situation, Arnold decided to ask his boss for advise.

A. To face　　　 B. Having faced　

C. Faced　 　　D. Facing