问题
选择题
The children are having a good time, ______ with sand, others with toys.
A.some of them playing
B.some of them are playing
C.some of them
D.who playing
答案
答案:A
The children are having a good time, ______ with sand, others with toys.
A.some of them playing
B.some of them are playing
C.some of them
D.who playing
答案:A