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 Weneedtogettotherootoftheproblem

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問題詳情:

 Weneedtogettotherootoftheproblem

 We need to get to the root of the problem______ we can solve it.

A. while              B. after

C. before             D. as

【回答】

C

知識點:連詞

題型:選擇題

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