1 . —The test is very important to us. Do you think so?
—Yes, so we ________ be too careful during the test.

A．mustn’t

B．daren’t

C．needn’t

D．can’t

2 . In science, facts should be proved by experiments and research, and we ______ always believe everything we read and hear -- even if it is a great story.

A．can not

B．may not

C．must not

D．should not

3 . His greatest skill is that he ______ cook a meal of four dishes and a soup in less than half an hour.

A．must

B．need

C．can

D．would

4 . ________ you make so much noise, Jimmy? Your little sister is still sleeping.

A．Can’t

B．Must

C．May

D．Won’t

5 . — Why don’t you enter the office? They are waiting for you.
— The door ________ open, no matter how hard I pushed.

A．won’t

B．can’t

C．mustn’t

D．needn’t

6 . Didn't she notice they were crying there? How ________she just walk away from her children like that?

A．should

B．would

C．could

D．need

7 . Though the girl is really proud of having a Louis Vuitton handbag, she ________tell a fake one from a real one.

A．can hardly

B．shouldn’t

C．can really

D．mustn’t