4. He must use the computer every day, so it _________ mended at once.

A. can be　　 B. may be　　 C. must be　　 D. have to be

3. ---Waiter, I’d like some Ningbo Dumplings.

　 ---Sorry, sir. Ningbo dumplings__________ only for lunch and dinner.

A. sever　　 B. served　　 C. are severed　　 D. are severing

2.　 Let’s play cards instead of __________ TV.

A. watch　　 B. to watch　　 C. watches　　 D. watching

1.　　　 Our classroom must __________ clean every day.

A. keep　 B. to keep　　 C. be kept　 D. to be kept

Title：What should or should not teenagers be allowed to do ？

05．We plant trees every year. (改为被动语态)

　__________ __________ __________ every year.

04．Sixteen-year-olds should be allowed to drive. (改为否定句)

Sixteen-year-olds __________ __________ __________ allowed to drive.

03．She has lunch at twelve and I have lunch at twelve, too. (改为同义句)

She has lunch at twelve and __________ __________ __________.

02．I can’t decide which one I should buy. (改为简单句)

　 I can’t decide which one __________ __________ .

01．They are going to play football. They aren’t going to swim tomorrow. (合并成一个句子)

　 　They are going to play football __________ __________ __________ tomorrow.