It will take a lot of time, so you must be ______, young man.
When I was young, my father told me__________.
—Peter looks sporty. —Yes. He is the ______runner in my class.
We won’t go sightseeing if ____ tomorrow.
—The classroom is ____ clean ____ it was yesterday. — Sorry, I forget to clean it.
I was just falling asleep ____ there was a loud knock at the door.