There are so many kinds of Mp3 in the shop. We can’t decide . A. what to buyB. to buy wh

问题补充：

There are so many kinds of Mp3 in the shop. We can’t decide .

A. what to buy

B. to buy what

C. which to buy

D. to buy which

答案：

A. what to buy

B. to buy what

(答案→)C. which to buy

D. to buy which

解析：本题的含义是我们不能决定买那个，疑问词which后加动词不定式to do代替从句，故本题选C。