13. Fresh air and exercise 　　　　　　　　　　　　　(有助于)good health.(contribute)

12. We should 　　　　　　　　　　　　　　　　　　(以……为榜样)top students who are always strict with themselves.(example)

11. Work harder and success is 　　　　　　　　　　　　　　　　　(就在眼前).(corner)

20. This comment applies to every state-run hotel in the country, __________________________ (正如在文件中所说的). (as)

19. The consumers complains that the new product is ______________________________(远不令人满意), so we have to so something to improve it. (far)

18. They have ___________________________________________ (渴望) knowledge. (appetite)

17. He bought a car, _________________________________________ (不管费用). ( regard)

16. _______________________________________ ( 因为没有太多的经验), the new postgraduates are so easily taken in by some cheats in society. ( have)

15. The food ________________________________________(已经用完) .Could you go to the supermarket and get some? ( run)

14. People often _________________________________ (把……人称作) who are willing to help others as Lei Feng. (refer)