11.and→but 　　12.time→times 　13.to→for　　 　14.that→those 　15.去掉one　 　16. √　　　17.takes→took 　18.build前加to 　19.had→have　　 20.what→how

4

After a day of work, the body need to have a rest.　　　　　1. ____________ Sleep is unnecessary for good health. The rest you　　　　　　2. ____________ get while sleep makes your body able to prepare 　　　　　　3. ____________ itself the next day. There are four levels of sleep.　　　　　4. ____________ Each is little deeper than the one before. As you 　　　　　　5.____________ will sleep, your body relaxes (放松). Your heart　　　　　　6. ____________ beats more slowly and your brain slows down. If you 　　　　　7. ____________ have troubles falling asleep, some people suggest　　　　　　 8. ____________ breathing slowly and deeply and the other people　　　　　　9. ____________ believe drink warm milk will help you get sleepy. 　　　　　　10. ____________ 　Will you try them both?

6. frightening　 7. moment　 8. Really　 9. my　 10. during　

1. dangerous　 2. into　 3. completely　 4. Luckily　 5. death　

8. confirmed　 9. least　 10. departure

( 5 )

1.　　　 book　 2. class　 3. flight　 4. round　 5. By　 6. fare　 7. season　

7. explained　 8. along　 9. hiring　 10. sometime

( 4 )

1. ever.　 2. practice　 3. seems　 4. around　 5. depend　 6. fair　

8. lying　 9. terrible　 10. ahead

( 3 )

1. top　 2. other　 3. phone　 4. yet　 5. trouble　 6. roof　 7. pale　

8. survived　 9. resistance　 10. protects

( 2 )