---Who’s the man over there? Is it Mr. Black?--- It _________ be him. He’s much taller.
We don’t know her. She is a ______ to us.
Peter, please give my best wishes ______ your family.
Peter is afraid ______ English in class because his pronunciation isn’t good.
It will take a lot of time, so you must be ______, young man.
If we don’t use money ______, we’ll have a difficult time.