We know that light ___________ (travel) very fast.翻译句子,并填空,请将清原因,
问题描述：
We know that light ___________ (travel) very fast.翻译句子,并填空,请将清原因,
答
travels.因为光传播的很快是个客观真理.客观真理用的时态为一般现在时.light光是不可数名词,因此动词应为第三人称单数 形式.