—–I think the man over there must be Tom.—–It _____ be him. He has ______ to America.
Some rules _________ to stop people from polluting the environment.
I can’t go to the party, because I have to ________ my daughter at home.
—________ you tell us a funny story?—Certainly.
In order ________ for class, Lily gets up early every morning.
The baby is sleeping. Will you __________ the radio?