摘要: -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 选C. 考查时态题. 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.

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