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Whenhesawallhisbooks

練習題1.9W

問題詳情:

Whenhesawallhisbooks

When he saw all his books _____ here and there on the floor, he knew that something terrible _____.

A. lying; must have happened B. lie; must happen

C. lay; might have happened D. had lain; could have happen

【回答】

A

知識點:動詞時態

題型:選擇題