( )I usually sleep with the window open it’s very cold . A. until B. unless C. as D. if——青夏教育精英家教网—

摘要：( )I usually sleep with the window open it’s very cold . A. until B. unless C. as D. if

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I usually sleep with the window open _____ it’s very cold.

A. until B. unless C. when D. if

I usually sleep with the window open _____ it’s very cold .

A. until B. unless C. as D. if

I usually sleep with the window open it’s very cold．

A．until B．unless C．as D．if

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