题目

---- Would you have gone shopping had it been possible?    ---Yes, but I ___ busy doing my homework.            A. was   B. were   C. had been   D. would be 答案：A 解析:  问句是一个与过去事实相反的虚拟语气，答语中的 “but”, 引出了一个过去事实,说明不去购物的理由。

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