题目内容
【题目】Lisa is thinking about which book ________.
A. buy B. bought C. buying D. to buy
【答案】D
【解析】
句意：丽莎正在考虑买哪本书。疑问词加不定式的作用相当于一个宾语从句，which book to buy相当于一个宾语从句放在介词about之后作宾语。to buy是动词不定式作定语修饰book。故选D。
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题目内容
【题目】Lisa is thinking about which book ________.
A. buy B. bought C. buying D. to buy
【答案】D
【解析】
句意：丽莎正在考虑买哪本书。疑问词加不定式的作用相当于一个宾语从句，which book to buy相当于一个宾语从句放在介词about之后作宾语。to buy是动词不定式作定语修饰book。故选D。