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36、I had to buy _________ these books because I didn’t know which one was the best.

A. both              B. none              C. neither         D. all

35、According to a recent U.S. survey, children spent up to 25 hours a week _________ TV.

A. to watch       B. to watching            C. watching          D. watch

34、Children under 12 years of age in that country ________ be under adult supervision when is a public library.

A. must         B. may      C. can       D. need

33、The first use of atomic weapons was in 1945. and their power ______ increased enormously eversince.

A. is        B. was      C. has been      D. had been

32、The number of deaths form heart disease will be reduced greatly it people _______ to eat more fruit and vegetables.

A. persuade         B. will persuade        C. be persuaded      D. are persuaded

31、Bill’s aim is to inform the viewers that cigarette advertising on TV is illegal, _______?

A. isn’t it            B. is it         C. isn’t be         D. is he

30、He speaks English well indeed, but of course not _____ a native speaker.

A. as fluent as    B. more fluent than   C. so fluently as      D. much fluently than

29、The flu is believed _______ by viruses that like to reproduce in the cells inside the human nose and throat.

A. causing       B. being caused         C. to be caused        D. be have caused

28、The flowers ____ sweet in the botanic garden attract the visitors to the beauty of nature.

A. to smell             B. smelling         C. smelt           D. to be smelt