27. The traveler, 　　　　inexperienced, doesn^’t know how to plan a trip.

A. to be　　 B. being　　 C. is　 　　　D. as being

26. It is said that the best time to visit is in June or July , 　　　　the South American winter cools the city.

　 A. where　　 B. which　 C. on which　 D. when

25. Samuel Clemens , 　　　　as Mark Twain , was one of the most famous American writers.

　 A. to know　 B. to be known　 C. known　　 D. knowing

24. Carnival , a 　　　　festival , is very famous and attracts visitors from all over the world.

A. four days　 B. four days^’　　 C. four-days　 D. four-day

23. Tom is so talkative. I^’m sure you^’ll soon get tired 　　　　him.

　 A. of　 B. with　 C. at　 D. on

22. We get along quite well though there are quarrels between us 　　　　.

　 A. now and then　 B. here and there　 C.　 at one time　 D. up and down

21. －Will you go to attend her birthday party?

－No, 　　　.

　 A. even if invited　 B. if not invited　 C. unless invited to go　 D. even though invited to

20. A black woman _____ for refusing to stand up for a white man on a bus, which led to a demonstration.

　 A. got to arrest B. was to arrest C. had arrested D. got arrested

19. For years black people had been fighting for their rights, 　　　　, many public places were opened to them.

　A. As a result　 B. As a matter of fact　 C. For some reason D. However

18. Mary worked very hard and 　　　　a good example to her classmates.

A. gave B. put C. set D. laid