题目内容
The two balls fell ________the same speed and landed ________the ground at the same time.?
| A.off;on | B.by;in | C.with;on | D.at;on |
D ?
at the same speed以同样的速度;on the ground在地面上。?
练习册系列答案
相关题目
题目内容
| A.off;on | B.by;in | C.with;on | D.at;on |