It was only 3 hours the policeman caught the robber.A．beforeB．sinceC．whenD．
题型：不详难度：来源：
It was only 3 hours the policeman caught the robber.| A．before | B．since | C．when | D．that |
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答案
| A |
解析
试题分析：考查固定句型。固定句型：it be一段时间before从句；before引导的时间状语从句中使用一般现在时代替将来时，主句使用将来时。如果before从句使用一般过去时，前面的主句也使用一般过去时。本句意为：一段时间以后某事才发生。句意：仅仅三个小时以后警察就抓住了强奸犯。故A正确。
点评：固定句型：it be一段时间before从句；before引导的时间状语从句中使用一般现在时代替将来时，主句使用将来时。如果before从句使用一般过去时，前面的主句也使用一般过去时。 |
举一反三
| There is no doubt _______ my friend is not satisfied with what they have done. |
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