It takes me half an hour my homework.A. finishingB. finishesC. to finishD. finish

问题补充：

It takes me half an hour my homework.

A. finishing

B. finishes

C. to finish

D. finish

答案：

A. finishing

B. finishes

(答案→)C. to finish

D. finish

解析：take 用于 it takes sb ... to do sth句型，仅指花费时间（three hours等），必须用it作形式主语，指代下文不定式内容；故选C。