题目内容
We _______ on this project for four hours. Let’s have a rest.
A. are working B. have been working
C. worked D. had worked
【答案】
B
【解析】考察时态。根据for four hours可知是与现在完成时连用的，在根据句意可知使用现在完成进行时。句意：我们已经一致工作了4个小时，让我们休息一下。
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