Mrs. Brown I don’t think we can get there on time by bikeYou mean it’s for us

问题补充：

--- Mrs. Brown, I don’t think we can get there on time by bike.

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

A. necessary

B. important

C. possible

D. difficult

答案：

(答案→)A. necessary

B. important

C. possible

D. difficult

解析：本题考查的是it is +adj for sb to do sth，再根据意思可知答案为A