问题
选择题
So many kinds of sweets! I really can’t decide _______.
A．what to buy
B．which to buy
C．to buy which
D．to buy what
答案
B
题目分析：句意：有许多种类的糖果！我真的不能决定买哪一种。疑问词可以放在动词不定式标记to之前，和动词不定式一起构成动词不定式短语。结合上句可知该选B。
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