I usually sleep with the window open ________ it's very cold. [ ]A. untilB. unlessC. when D. if

题目简介

I usually sleep with the window open ________ it's very cold. [ ]A. untilB. unlessC. when D. if

题目详情

I usually sleep with the window open ________ it's very cold.
[     ]
A. until
B. unless
C. when
D. if
题型:单选题难度:中档来源:浙江省模拟题

答案

B

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