1 . —May I smoke here? —If you _______, choose a seat in the smoking section.(用适当的词填空)

2 . Days later, my brother called to say he was all right, but _______say where he was.

A．mustn’t

B．shouldn’t

C．wouldn’t

D．mightn’t

3 . The school has made it a rule that students __________ not use mobile phones in class. (用适当的词填空)

4 . Anyone who wants to be a firefighter __________ have a sharp mind and calm nerves. (用适当的词填空)

5 . You __________ switch off your electronic devices when taking a plane. (用适当的词填空)

6 . Anyone who wants to get the driving license __________ pass the eye test. (用适当的词填空)

7 . Johnny, you __________ not play with the knife. you __________ hurt yourself. (用适当的词填空)

8 . According to the law, people under eighteen __________ not drink or smoke. (用适当的词填空)

9 . — I can hear the water running in the bathroom.

— Yes, Bria __________ be taking another shower. (用适当的词填空)

10 . __ It is so late. Our son __________ be back .
__ Don’t   worry . I dare say he ________ have some extra work to do.

A．can ; must

B．will ; might

C．should ; must

D．must ; may