they stayed at home on vacation.(就划线部提问）（ ） （ ）they( )on vacation?
问题描述：
they stayed at home on vacation.(就划线部提问）
（ ） （ ）they( )on vacation?
答
划线的是什么？
如果是stayed at home都划线应该是：what did do
如果只划线at home应该是where did stay
答
Where did they stay on vacation?