He said it would be at least three more months ________ he could recover and ret
题型：不详难度：来源：
He said it would be at least three more months ________ he could recover and return to school.| A．when | B．before | C．since | D．after |
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答案
| B |
解析
试题分析：考查固定句式。要抓住before在…之前的根本意义。本句考查了before的句式“一段时间以后某事才发生”；使用It be 一段时间 before…一段时间以后某事才发生；该句式主要考查时态，如果before后面使用一般现在时，前面的主语使用将来时；如果before后面使用一般过去时，前面也使用一般过去时；
本题符合该用法。
点评：考查固定句式：It be 一段时间 before…一段时间以后某事才发生；如果before后面使用一般现在时，前面的主语使用将来时；如果before后面使用一般过去时，前面也使用一般过去时； |
举一反三
I wouldn’t lose courage ______ I should fail ten times.| A．in order | B．so that | C．even if | D．as if |
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| He was about to make a call to Tom _____ Tom patted me on the shoulder. |
Mountain climbing ________ be very tiring, and many people feel sick ________ the atmosphere gets thinner.| A．may; while | B．can; as | C．must; though | D．should; for |
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Please take down my telephone number ________ something important happens.| A．in case | B．now that | C．even though | D．as if |
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| Colin was about to get off the camel ________ a child ran towards him. |
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