问题描述：
The children are having a good time,
_____ with sand others with toys.
A.some of them playing B.same of them are playing
C.some of them D.who playing
为什么,请解析,
_____ with sand others with toys.
A.some of them playing B.same of them are playing
C.some of them D.who playing
为什么,请解析,
问题解答：
我来补答展开全文阅读