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 Peopleshouldopenthewindowinthemorningtomakeair

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 Peopleshouldopenthewindowinthemorningtomakeair

 people should open the window in the morning to make air ________ in order to keep the indoor air fresh.

    A. subscribe          B. circulate          lerate          D. reject

【回答】

B

知识点:单词

题型:选择题

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