2 . Sometimes smiles around the world ________ be false, hiding other feelings like anger, fear or worry. (用适当的情态动词填空)

3 . It   ________   be the vocabulary that caused you the problem in the exercise because you know a lot of words. (用适当的情态动词填空)

5 . —I’m leaving for Shanghai tomorrow for the Spring Festival holiday.
—Good for you. Remember to bring more clothes because the winter in Shanghai _______ be very cold sometimes.

A．would

B．shall

C．can

D．may

6 . That’s why Letter from Father Christmas ________ the perfect book for those who regard Christmas as a special time of year.

A．should be

B．couldn’t be

C．shouldn’t be

D．could be

7 . As our best friend, Tanya ________ have known the truth, or she would have told us.

A．mustn’t

B．can’t

C．shouldn’t

D．needn’t

8 . He ________ be our English teacher. Our teacher Jerry has gone to Beijing.

A．needn’t

B．mustn’t

C．can’t

D．wouldn’t

9 . Dark thoughts about your physical appearance can hang over you all the time like a rain cloud. (英译汉)

10 . —Must I finish my homework?
—No, you needn’t. But you ______ finish it tomorrow.

A．can

B．must

C．may

D．will