There are so many kinds of MP5 in the shop.We ca

问题描述:

There are so many kinds of MP5 in the shop.We ca
There are so many kinds of MP5 in the shop.
We can't decide _______ .
A.what to buy.B.to buy what.C.which to buy.D.to buy which.

C
动词不定式与疑问词连用:疑问词+ TO DO ,故排除B与D,句中已说明是MP3,不必问买什么,排除A