----Must he finish the work before supper?----No, he        . He         finish it after supper.

— I missed the earliest flight in the morning. It was really a pity. —You _________ to the airport by taxi instead of by bus.

—Mary broke up with me!—You_ _have forgotten about the Valentine's Day．

If prices rise too high, the government has to do something _________ it. 

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