—Shall we keep the windows _______ ? —Sure , so that we can let clear air in . B

题干

—Shall we keep the windows _______ ?
—Sure , so that we can let clear air in . But when we leave the classroom , they must be ______ .

A．opened , closed

B．closed , open

C．close , opened

D．open , closed

上一题下一题 0.15难度单选题更新时间:2018-03-09 07:02:29

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