He usually does his homework two hours in the evening.A. aboutB. toC. inD. for

问题补充：

He usually does his homework two hours in the evening.

A. about

B. to

C. in

D. for

答案：

A. about

B. to

C. in

(答案→)D. for

解析：表示做某事的时间长度可用介词for，故本题选D。