(2014年高考北京卷)

32. I found the lecture hard to follow because it _______ when I arrived.

A. started B. was starting

C. would start D. had started

【考点】 考察时态

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【答案】 D

【解析】 句意：我发现这个报告很难懂，因为当我到的时候，它已经开始了。根据句意可知这个报告是在我到达之前就开始看，而句中我到达使用了arrived，而报告是在这之前发生的，所以使用过去完成时。故D正确。

【举一反三】 —Peter , where did you guys go for the summer vacation?

—We________ busy with our work for months, so we went to the beach to relax ourselves.

A. were B. have been C. had been D. will be

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〖答案〗 C.

〖考点〗 考查时态题.

〖解析〗 我们去海边发生在过去. 而我们忙于工作在此之前. 因此用过去完成时.