33.Don’t you think that______________ is no use promising without doing?

　 A. this　　　　　 B. that　　　　 C. it　　　　 D. what

32.The children were warned of not being too _______ about things you are not supposed to know.

　　　 A．strange　　 B．amusing　　 C．curious　　 D．satisfied

31.Americans eat____ vegetables per person today as they did in 1990.

A. more than twice　 　 B. as twice as many　

C. twice as many as　 D. more than twice as many

30. Students　 ______ remain in their seats until all the exam papers have been collected.

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

29.The atmosphere of the earth ______ us from the strong sun light.

A. prevents　　 　　B. keeps 　　　　　　C. stops　　　　　　 D. protects

28.---How well did John do in the match?

　 　--Wonderful. I think we can’t have a ______ player in our football team.

A. good　　　　 B. well　　　　　 C. better　　　　 D. best

27.Many countries are increasing their use of natural gas , wind and other forms of ______.

A. power　 B. force　　 C. energy　 D. strength

26.The fact that many college graduates get lower pay than some workers has ______ a heated discussion.

A. set out　　 B. set about　 C. set up　 D. set off