—This pair of shoes ____ belong to Jack. He likes this kind very much.—It ____ be his. It’s too large for him.
Our government is taking action to improve the environment.
How long does it take your father ______ to work every day?
Either they or Paul ______ to go to Beijing in 2014.
The students always have ______ to do.
He ______ at 6:00 in the afternoon.