—Kate I don’t think we can go to the Palace Museum by bike on time. —You mean it’s for u

问题补充：

—Kate, I don’t think we can go to the Palace Museum by bike on time.

—You mean it’s for us to take a taxi there?

A. important

B. possible

C. necessary

D. difficult

答案：

A. important

B. possible

(答案→)C. necessary

D. difficult

解析：important重要的；possible可能的，合理的；necessary必要的；difficult困难的。句意：凯特，我认为我们骑自行车不能按时到达故宫博物馆。——你的意思是我们有必要乘出租车到那儿？结合语境可知选C。