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外语
I didn’t manage to work out the problem______the teacher had explained how.
I didn’t manage to work out the problem______the teacher had explained how.
admin
2015-05-21
32
问题
I didn’t manage to work out the problem______the teacher had explained how.
选项
A、until
B、unless
C、when
D、before
答案
A
解析
本题考查连词的用法。until的意思是“直到…才…”,unless表示的意思是“除非…”,when的意思是“当…时候”,before的意思是“在…之前”。故正确的答案为A。
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本试题收录于:
公共英语二级笔试题库公共英语(PETS)分类
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公共英语二级笔试
公共英语(PETS)
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