21. The pressure _B_ causes Americans to be energetic, but it also puts them under a constant emotional strain.

　　A competing B to compete C to be competed D having competed

　　22. As teachers we should concern ourselves with what is said, not what we think _C_.

　　A have to be said B must say C ought to be said D need to say

　　23. Once environmental damage _A_, it takes many years for the system to recover.

　　A is done B is to do C does D has done

　　24. Studies show that the things that contribute most to a sense of happiness cannot be bought, _B_ a good family life, friendship and work satisfaction.

　　A as for B such as C in case of D in view of

　　25. He will agree to do what you require _D_ him.

　　A for B from C to D of

　　26. The mere fact _A_ most people believe nuclear war would be madness does not mean that it will not occur.

　　A that B which C what D why

　　27. John seems nice person. _C_, I don't trust him.

　　A Even though B Therefore C Even so D Though

　　28. I don't think it advisable that Tom _A_ to the job since he has no experience.

　　A be assigned B will be assigned C is assigned D has been assigned

　　29. _D_, a man who expresses himself effectively is sure to succeed more rapidly than a man whose command of language is poor.

　　A Other things to be equal B Were other things equal

　　C To be equal to other things D Other things being equal

　　30. _C_ that my head had cleared, my brain was also beginning to work much better.

　　A For B Since C Now D Despite

　　31. By 1929, Mickey Mouse was as popular _B_ children as Coca-Cola.

　　A for B with C to D in

　　32. Because Edgar was convinced of the accuracy of this fact, he _A_ his opinion.

　　A stuck to B strove for C stuck at D stood for

　　33. It’s no use _B_ me not to worry.

　　A you tell B your telling C for you to have told D having told

　　34. If it _A_ too much trouble, I’d love a cup of tea.

　　A isn’t B wasn’t C weren’t D hadn’t been

　　35. She was glad that her success would ___ for the women who would follow.

　　A make things easier B make it easier C be easier D be easier to make

　　36. We object _C_ punishing a whole group for one person’s fault.

　　A against B about C to D for

　　37. The newest satellite can _A_ a thousand telephone conversations and a color TV program at the same time.

　　A carry B extend C bring D take

　　38. The grey building is where the workers live, and the white one is where the spare parts _B_.

　　A are producing B are produced C produced D being produced

　　39. _A_ a teacher in a university, it is necessary to have at least a master's degree.

　　A To become B Become C One become D On becoming

　　40. The little man was _C_ more than one metre fifty tall.

　　A nearly B quite C hardly D almost

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