I___(buy)a book the day before yesterday.

问题描述:

I___(buy)a book the day before yesterday.

bought
the day before yesterday是前天,用过去时

你好

填 bought

I bought a book the day before yesterday.
我前天买了一本书

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应该是
bought
前天,所以用过去式
前天我买了一本书
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