题目内容：

When they see the little mouse,they don't catch him and go on ____.A.sleeping B.sleep C.sleeps

优质解答

A,当他们看见这只小老鼠的时候,他们没去抓它,继续睡觉
go on doing sth

追问：

是不是因为有go，所以后面的动词加ing

追答：

go on doing sth 继续做某事 固定词组