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are there many factories in shenzhen 50 years ago?这句话错在哪里?

分类: 作业答案 • 2021-12-31 12:40:48

问题描述：

are there many factories in shenzhen 50 years ago?这句话错在哪里?

答

Are要改成were,因为50 years ago说明这句话是过去式,所以要用过去式were