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A man escaped from the prison last night. It was a long time ______ the guards discovered what had happened.
A man escaped from the prison last night. It was a long time ______ the guards discovered what had happened.
admin
2010-01-15
30
问题
A man escaped from the prison last night. It was a long time ______ the guards discovered what had happened.
选项
A、before
B、until
C、since
D、when
答案
A
解析
before用在复合句中,通常强调主句动作发生在从句动作之前,表示“先……再……;先……然后……;而后”,如;All things are difficult before they are easy.诸事先难后易。Before I could understand the first question,the teacher had begun the second one.我还没理解第一个问题,老师已开始讲第二个问题了。
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0
专业英语四级
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