1 . There’s a public sign in the library, saying no person ________ bring food and drinks into the reading room.

A．shall

B．will

C．need

D．must

2 . ——My computer ____start, no matter how hard I try.
——lt might have crashed.

A．won’t

B．shouldn’t

C．mustn’t

D．wouldn’t

3 . —Good morning. Doctor Brown’s office.
—Hello, this is Tom Smith. Could you please tell Doctor Brown I ________? My car ________ start.

A．was delayed, doesn’t	B．will be delayed, won’t
C．am delayed, didn’t	D．would delay, mustn’t