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_____you _____your book to the library?Yes ,I returned it ye

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_____you _____your book to the library?Yes ,I returned it yesterday.为什么填进去的是have 与reture
_____you _____your book to the library?Yes ,I returned it ye
_Have____you returned_____your book to the library?Yes ,I returned it yesterday.
你已经把你的书还到图书馆了吗?
用完成时是因为发问者并不知道还是没还.
Yes ,I returned it yesterday
是的,我昨天还的.
这就是说明一个事实,用过去式就行.