–Do the Smiths live next to you? --No, but they .A．used to B．used to do itC．used to be D．used 题目和参考答案——青夏教育精英家教网—

题目内容

–Do the Smiths live next to you? --No, but they____.

A．used to B．used to do it

C．used to be D．used

【解析】

试题分析：句意：—史密斯一家挨着你住吗？—不，但是他们以前是。动词不定式后的宾语省略。故选A。

考点: 考查不定式的用法。

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根据材料内容选择最佳答案，并将其标号填入题前的括号内。

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A．We are not sure how people started to use fire

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句型转换(10分)

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