We’d better take umbrellas—I’m sure it when we arrive in London; it’s always wet there at

问题补充：

We’d better take umbrellas—I’m sure it when we arrive in London; it’s always wet there at this time of year.

A. will rain

B. is raining

C. will be raining

D. would rain

答案：

A. will rain

B. is raining

(答案→)C. will be raining

D. would rain

解析： 考查时态。句意：我们最好带着伞，我确信当我们到达伦敦的时候将会下雨，在一年的这个时候伦敦总是潮湿的。根据句意指的是将来某一时刻进行的动作，故用将来进行时态，选C。