题目内容
I usually sleep with the window open _____ it’s very cold .
A. until B. unless C. as D. if
试题答案
1、B
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I usually sleep with the window open _____ it’s very cold.
A. until B. unless C. when D. if
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I usually sleep with the window open _____ it's very cold.
[ ]
A. until
B. unless
C. as
D. if
查看习题详情和答案>>
B. unless
C. as
D. if