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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