It's known to all that_light travels faster thansound.

分类: 作业答案 • 2021-12-28 18:23:46

问题描述：

It's known to all that___light travels faster than__sound.
A./ / B.a / C.the the D.the a

答

A 没有定冠词

It's known to all that___light travels faster than__sound.