A beam of light will not bend round corners unless______ to do so with the help of a reflecting device.

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问题 A beam of light will not bend round corners unless______ to do so with the help of a reflecting device.

选项 A、made
B、being made
C、having made
D、to be made

答案A

解析 unless made状语从句中省略了it is。完整的句子应是unless it is made…科技文献中常可见到这种语法现象。

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本试题收录于：英语题库普高专升本分类

英语

普高专升本

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A beam of light will not bend round corners unless______ to do so with the help of a reflecting device.

英语

普高专升本

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Manythingsaboutlanguageareamystery,andmanywillalwaysremainso.Butsomethingswedoknow.First,weknowthata

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