问题补充：
— What’s wrong with you, sir?
— My flight ten minutes ago. What should I do?
A. took up
B. took off
C. got on
D. got off
答案：
A. took up
(答案→)B. took off
C. got on
D. got off
解析：句意：--你怎么了，先生？--我的航班在10分钟前起飞了。我应该做什么？分析take up拿起；take off起飞； get on 上车； get off 下车。表示飞机起飞是固定短语：take off. 故选B
