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how long have you had to wait

分类: 作业答案 • 2021-12-28 18:44:01

问题描述：

how long have you had to wait
请问这句话换成：how long did you have to wait行吗?

答

不行因为它是现在完成时的固定形式

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of one's own短语意思
sin的平方等于?

how long have you had to wait

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