—Bob, your room is so dirty. It must ________ every day.
—OK. Mom, I’ll do it right now.
clean
be cleaned
is cleaned
I want to travel _______one day .
Luoying heard Wangsiyu___Mr.Zhang next office yesterday.
The missing boy was last seen ___ near the river.
They knew her very well. They had seen her ___ up from childhood.
---I'm sorry to keep you waiting. ---Oh, not at all. I ___ here only a few minutes.