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Our teacher said that light faster than sound.

A. travels B. was travelling

C. was travelled D. travelled

A 【解析】句意:我们老师说光比声音传播快。分析题干可知said之后是宾语从句,结合语境可知宾语从句中描述的是客观真理,所以用一般现在时,主语light表示抽象含义,是不可数名词,所以谓语动词用单数;故答案选A。
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