Our teacher said sound ( ) much more slowly than light?填什么及原因A tr_英语解答

Our teacher said sound ( ) much more slowly than light?填什么及原因
A traveled B wad traveling C has traveled D travels

人气：131 ℃　时间：2020-01-09 09:59:03

解答

D 表示一般常理道理知识的时候动词都用一般现在时比如地球绕着太阳转 theearth circles the sun