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Ican’tconcentrate

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問題詳情：

Ican’tconcentrate

I can’t concentrate ______ my lessons unless I’m free ______ noise.

A. on …with B. at…from C. on…of D. with… of

【回答】

C

知識點：介詞

題型：選擇題

Tags：Ican tconcentrate

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