题目内容
( ) 9. I usually sleep with the window open it's very cold.
A. until B. unless C. as D. if
9. B unless意为"除非"。题目的意思:除非天气很冷,我通常睡觉开着窗户。
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题目内容
( ) 9. I usually sleep with the window open it's very cold.
A. until B. unless C. as D. if
9. B unless意为"除非"。题目的意思:除非天气很冷,我通常睡觉开着窗户。