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    【题目】 ____ that caused him to serve dinner an hour later than usual.

    A. It was we being late

    B. It was our being late

    C. It was we were too late

    D. It was because we were late

    【答案】B

    【解析】此题容易误选D，认为强调的是原因状语从句because we were late。但实际上，强调的是句子主语our being late，此题若还原成非强调句，即为：Our being late caused him to serve dinner an hour later than usual. 注意，强调句的一个显著特点是，若去掉强调结构 it is/was…that…，句子仍然成立；换句话说，该结构中的that不能充当句子成分。

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