A lot of children are used to___their time ___up by their parents and they simply don't know___by themselves.
问题描述：
A lot of children are used to___their time ___up by their parents and they simply don't know___by themselves.
A.have;full;what to do B.having;filled;how to do
C.have;filling;what to do D.having;filled;what to do
答
C
be used to doing 习惯做某事
fill up填满,这里用filling动名词表主动
what to do做什么
how to do it才对,怎么做
如还有不懂的,还可以继续追问哦\(^o^)/~