There are different kinds of presents in the gift shop. I can’t decide .
A. to buy what
B. to buy which
C. what to buy
D. which to buy
网友回答
A. to buy what
B. to buy which
C. what to buy
(答案→)D. which to buy
解析：根据语境可知此题考查的是疑问词+动词不定式的基本用法。此句的含义是在礼物商店里有不同的礼物，我不能决定该买哪一个，根据选择项的提示可知A和B的结构不正确，C表示买什么，因为这里面都是礼物，故词义不通，故选D。