—Is Mary coming by plane?—He should ,but he _____not. He likes traveling by train.

--Must we move to the next room?--No, you____________ . You may still live here if you like.

The police still haven’t found her, but they’re doing all they      .

—Tom often drives carelessly.—Tell him he ________ answer for it if he goes on behaving like that. 

—Miss Li, must we hand in our homework right now?—No, you ____.You can hand it in tomorrow.