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Wewerehappythattimeandi'llneverforgetit.Webehappythattimeandi'llneverforgetit.

题目详情
We were happy that time and i'll never forget it.
We _____ ______ be happy that time and i'll never forget it .
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答案和解析
used to 表示过去做过某事,were 过去时,used to be“过去是”