【单选题】【消耗次数：1】
12. We didn’t catch the train _______ we left late.
①
so
②
because
③
but
④
though
参考答案：
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_____ that we couldn’ t catch up with him.
①
So fast he ran
②
So fast did he run
③
So fast ran he
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We are interested in the weather because it __________ us so directly --- what we wear, what we do, and even how we feel.
①
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①
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②
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③
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【单选题】
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①
would not reach
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③
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②
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①
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hurried up
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（ ）支持多个电信接口，并能够在所有接口上同时全速转发IP数据包，同时还必须支持核心层中使用的路由协议。
①
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