he field research will take Joan and Paul about five months; it will be a long t
题型：不详难度：来源：
he field research will take Joan and Paul about five months; it will be a long time _______ we meet them again. | A．after | B．before | C．since | D．when |
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答案
| B。 |
解析
| 该空表示在我们再见面之前要过很长时间，因此应填before引导时间状语从句。 |
举一反三
Many of them turned a deaf ear to his advice, _______ they knew it to be valuable. | A．as if | B．now that | C．even though | D．so that |
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_______,his idea was accepted by all the people at the meeting. | A．Strange as might it sound | | B．As it might sound strange | | C．As strange it might sound | | D．Strange as it might sound |
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I won’t call you, ________ something unexpected happens. | A．because | B．whether | C．unless | D．while |
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You will be successful in the interviewyou have confidence. | A．before | B．once | C．until | D．though |
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Most birds find it safe to sleep in the trees, but ________they have eggs or young chicks, they don’t use a nest. | A．why | B．how | C．unless | D．where |
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