____ the experiment,they left the laboratory.A.finished.B.Ha

____ the experiment,they left the laboratory.A.finished.B.Having finished 答案是b为...
____ the experiment,they left the laboratory.
A.finished.B.Having finished
答案是b为什么不选a

ellnak 1年前已收到1个回答举报

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“俊狼猎英”团队为您解答.
因为finished的动作明显在left的动作之前,所以用现在分词的完成时态,做时间状语.
祝你进步!

1年前

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