-does he take a shower?-six forty.A. What time; OnB. When; InC. What time; AtD. Where; Fo

问题补充：

-does he take a shower?

-six forty.

A. What time; On

B. When; In

C. What time; At

D. Where; For

答案：

A. What time; On

B. When; In

(答案→)C. What time; At

D. Where; For

解析：句意：--他几点洗澡？--在6:40.根据答语可知上句应该问的是几点，所以应该用what time或when；故排除D；第二空在具体的时刻前应该用介词at；故选C。