What were you doingthe rainstorm?A. at that timeB. in timeC. at the time ofD. when

问题补充：

What were you doingthe rainstorm?

A. at that time

B. in time

C. at the time of

D. when

答案：

A. at that time

B. in time

(答案→)C. at the time of

D. when

解析：句意：暴雨时你在做什么？at that time那时；in time 及时；at the time of在……的时候；when当···的时候，所以选C。