It is a long time _______they separated, but it won’t be long ____ they meet again. A．since; before ...
2023-01-10 20:13:35 135次 天津市2010届高三下学期第二次模拟考试（英语） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
It is a long time _______they separated,
but it won’t be long ____ they meet again.
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A．since; before
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B．after; when
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C．since; when
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D．after; before
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