(2011·江西高考)It ________be the postman at the door.It's only six o'clock.

A．mustn't B．can't

C．won't D．needn't

(2010·北京高考)—Good morning. I've got an appointment with Miss Smith in the Personnel Department.

—Ah, good morning. You ________ be Mrs. Peters.

A．might B．must

C．would D．can

(2012·上海高考)The new law states that people ________ drive after drinking alcohol.

A．wouldn't B．needn't

C．won't D．mustn't

(2012·辽宁高考)One of our rules is that every student ________ wear school uniform while at school.

A．might B．could

C．shall D．will

(2010·辽宁高考)Doctors say that exercise is important for health, but it ________ be regular exercise.

A．can B．will

C．must D．may

(2010·四川高考)—________ I take the book out?

—I'm afraid not.

A．Will B．May

C．Must D．Need

(2009·全国卷Ⅰ)What do you mean, there are only ten tickets？There________be twelve.

A．should B．would

C．will D．shall

(2012·全国卷Ⅰ)I ________ use a clock to wake me up because at six o'clock each morning the train comes by my house.

A．couldn't B．mustn't

C．shouldn't D．needn't

(2011·福建高考)—Shall I inform him of the change of the schedule right now?

—I am afraid you ________， in case he comes late for the meeting.

A．will B．must

C．may D．can

(2013·新课标全国卷Ⅰ)The door ________ open, no matter how hard she pushed.

A．shouldn't B．couldn't

C．wouldn't D．mightn't