​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为什么选C不选A?

问题描述:

​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
为什么选C不选A?