Look at those children ______ a lovely dog over there.

问题描述:

Look at those children ______ a lovely dog over there.
A.play with B.are playing C.playing with D.are playing with

C.playing with,动名词修饰those children为什么不是D?如果选D的话,这句话就有两个动词了,look和are playing with.语法错误