26. Desert plants ________ two categories according to the way they deal with the problem of surviving drought.

A. break down                               B. fall into

C. differ in                                     D. refer to

27. In the airport, I could hear nothing except the roar of aircraft engines which ________ all other sounds.

A. dwarfed                                     B. diminished

C. drowned                                    D. relative

28. Criticism without suggesting areas of improvement is not ________ and should be avoided if possible.

A. constructive                               B. productive

C. descriptive                                 D. relative

29. The Committee pronounced four members expelled for failure to provide information in the ________ of investigations.

A. case                                          B. chase

C. cause                                        D. course

30. Since neither side was ready to ________ what was necessary for peace, hostility were resumed in 1980.

A. precede                                       B. recede

C. concede                                      D. intercede

31. Such an ________act of hostility can only lead to war.

A. overt                                          B. episodic

C. ample                                         D. ultimate

32. ________ both in working life and everyday living to different sets of values, and expectations places a severe strain on the individual.

A. Recreation                                  B. Transaction

C. Disclosure                                  D. Exposure

33. It would then be replaced by interim government, which would ________be replaced by a permanent government after four months.(from www.yywords.com)

A. in step                                        B. in turn       

C. in practice                                  D. in haste

34. Haven’t I told you I don’t want you keeping ________ with those awful riding-about bicycle boys?

A. company                                    B. acquaintance

C. friends                                       D. place

35. Consumers deprived of the information and advice they needed were quite simply ________ every cheat in the marketplace.

A. at the mercy of                           B. in lieu of

C. by courtesy of                            D. for the price of

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