issue-overpopulation什么意思

euf32022-10-04 11:39:541条回答

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我是一个人哦 共回答了23个问题 | 采纳率87%
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Nowadays(overpopulation)has become a problem we have to face
Nowadays(overpopulation)has become a problem we have to face 中become是不是应该用became
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maquewawa 共回答了19个问题 | 采纳率94.7%
不是,become的过去式为became,过去分词为become.此题中用后者,与has构成现在完成时~