It_____ have been Tom that parked the car here, as he is the only one with a car.

——Who’s the man over there?Is it Mr. Black?——It______be him. He’s much taller.

The work is too hard for him. He__________ finish it on time.

 Children of divorced parents ______ have difficulty in forming stable relationships themselves.

—Can we leave the classroom now?—No, you _________. You _________ to leave until the bell rings.