the girls are playing over there.(就划线部分提问) _____are the girls____over there?

问题描述:

the girls are playing over there.(就划线部分提问) _____are the girls____over there?
为什么?

What,doing
划线部分是playing,是就动词的ing形式划线的,所以特殊疑问词用what,what后面接一般疑问句,由于划线部分是动词ing形式,所以后面还有加上doing,句子才完整.