7. ___ bookcase is this?" "It must be_________ . 

A. Who's; Tom        B. Who's; Tom's

C. Whose; Tom's       D. Whose; Tom

6.  —What can we do to_____________ bird flu from spreading?

―Try not to buy or eat chickens that have not been checked.

A. prevent        B. cause  C. discover

5.  Not only my friends but also I ___________interested in football and Messi is our favorite star.

A. be    B. am      C. is         D. are

4. 一Mum, must I wash the dishes right now?

―No, you__________  

A. shouldn't      B. wouldn't

C. mustn't        D. needn't

3. 一Difficulties always go with me! 

 —Cheer up! If God closes a door in front of you, there ___________be a window opened for you.

A. would    B. must    D. could    D. can

2. The woman who is talking with Mr. Brown ________  be Miss Li. She has gone to

England.

A. can't    B. must        C. may        D. mustn't

―We_________ go to Xiamen, but we're not sure.

A. needn't    B. must        C. might       D. mustn't

5.    Tom is free now. He___________ help you with your math.

4.    The man _________  be our math teacher. He is much taller.

3.    The black car __________  belong to Mr. Green or Mr. Brown. They both have black cars.