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22. A. to                       B. through             C. over                  D. for

21. A. practice                     B. routine                     C. process              D. service

20. A. used                   B. promised           C. deserved            D. happened

19. A. climate               B. scenery             C. storm                D. burden

18. A. order                  B. pay                   C. call                   D. search

17. A. forced                B. refused              C. adjusted            D. gathered

16. A. break                  B. flood                C. sink                  D. crash

14. It was unfortunate that their new car 　　　　 halfway to the airport.

A. broke off     B. got over     C. broke down    D. got away

13. The research team has improved the technology, 　　　 useful for the engineers’ work.

A. that I think is   B. what I think is   C. I think it is   D. which I think is