试题 试卷
题型：单选题 题类：常考题 难易度：普通
试题来源：北京市海淀区2017-2018学年高二上学期英语期中考试试卷
—She may have been separated from the other students and ______ have heard anyone when the thunder started.
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组卷次数：25次 +选题
—Well, I don't know. It do.
—Sure. Go ahead!
— When big firms reduce their expenses, we ______ know that times are really hard.
—You _________ it in the wrong place.
—Mum, it's not been decided yet. I ______ continue my study for a higher degree.
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