―Theaccidentmightnothavehappened,hadwebeenmorecareful....
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问题详情:
―The accident might not have happened, had we been more careful.
―But we ______.
A. weren’t B. didn’t C. hadn’t D. don’t
【回答】
A知识点:虚拟语气与情态动词
题型:选择题
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