-- Are these _______ all from No. 2 Middle School? -- Yes. They often _________ their free time to help the old here.

 You ______be tired after working for eight hours without ______ a rest.

—Do you think the phone is genuine(真品)? —I don’t think it ______ be a fake, as this shop has a very good reputation. 

________I smoke   here ?----No. you can’t.

If prices rise too high, the government has to do something _________ it.