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Luckily,allthestudentsgotoutoftheoldteachingbuilding   ...

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問題詳情:

Luckily,allthestudentsgotoutoftheoldteachingbuilding   ...

Luckily, all the students got out of the old teaching building         it fell down.

       A. as       B. before        C. since          D. till

【回答】

B

知識點:連詞

題型:選擇題

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