20. Most business letters and government reports are the main situations _________ formal language is used. w.w.^w.k.&s.5*

　 　　 A. where　　　　　 　　 B. that　　　　 　　　　　　 C. what　　　　 　　　　　　　　　　 D. which

19. I heard she _________ a book last year, but I don’t know if she has finished it.

　 　　 A. was writing　　　 　　　 B. wrote　　　 　　　　　　　　 C. had written　 　　　　　　　　　 D. writes

18. Few visitors leave Rio feeling _________.

　 　　 A. disappointing　　　 B. to disppoint　　　 　　 C. disappointed　　 　　　　　　　 D. being disppointed

17. He made a big mistake, and _________, he lost his job.

　 　　 A. as a result　　　 　　　　 B. as soon as　　　 　　　　 C. in case　　　 　　　　　　　　　　　 D. even if

16. The forest guards often find campfires that have not been _________ completely.

　 　　 A. put away　　　 　　　　 B. put out　　　 　　　　　　 C. put up　　　 　　　　　　　　　　　　 D. put off

15. My mother ______ live in the country by herself, but now she got used to ______ together with us in the city.

　 　　 A. used to; live　　 　　　 B. got used to; living　 　　 C. used to; living　　 　　　　　　 D. was used to; live

14. Going on a trip to a far-away destination _________ be expensive and difficult, but it is very interesting.

　 　　 A. can　　　　　 　　　　 B. must　　　　 　　　　　　 C. should　　　　 　　　　　　　　　　 D. will

13. We are _________ that she should be admitted into our club.

　 　　 A. likely　　　　 　　　　　 B. mental　　　　 　　　　　　　　　 C. anxious　　　 　　　　　　　　　　　 D. willing