题目内容
【题目】--- There were so many books in the shopping center, I didn't know_______ .
A. where to buy B. which to buy
C. how to buy D. what to buy
【答案】B
【解析】试题分析：句意：在这个购物中心中有如此多的书，我不知道去买哪一本。分析：考查宾语从句的特殊形式，省略主语和助动词，用疑问词+ to do. 联系上文，表示不知道去买哪一本，因此用疑问词which. 构成为which to do .故选 B
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