52. 　　What is crucial is recognizing that sustainable agriculture is not just about sustainable food production. 　　How do people ofen measure progress in agriculture? 　　
(A) By its productivity
(C) By its impact on the environmet 　　
(B) By its sustainability
(D) By its contribution to economic growth

32. A. Their performance may improve. 　　B. Their immune system may be reinforced 　　C. Their blood pressure may rise all of a sudden. 　　D. Their physical development may be enhanced.

33. A. Improved mental functioning C. Speeding up of blood circulation 　　B. Increased susceptibility to disease D. Reduction of stress-related hormones

34. A. Pretend to be in better shape. C. Turn more often to friends for help 　　B. Have more physical exercise . D. Pay more attention to bodily sensations.

35. A. Different approaches to coping with stress. 　　B. Various causes for serious health problems. 　　C. The relationship between stress and illness. 　　D. New finding of medical research on stress. 　　

53. Specialisation and the effort to incease yields have esulted in________. 　　(A) Localised pollution (C) competition from overseas 　　(B) the shrinking of farmland (D) the decrease of biodiversity

54.What does the author think of traditional farming practices? 　　(A)They have remained the same over the centuries 　　(B)They have not kept pace with population growth 　　(C)They are not necessarily sustainable 　　(D)They are environmentally friendly

55.What will agriculture be like in the 21st century 　　(A) It will go through radical changes 　　(B) It will supply more animal products 　　(C) It will abandon traditional farming practices 　　(D) It will cause zero damage to the environment

56 What is the author’s purpose in writing this passage? 　　(A) To remind people of the need of sustainable development 　　(B) To suggest ways of ensuring sustainable food production 　　(C) To adance new criteria for measuring farming progress 　　(D) To urge people to rethink what sustainable agriculture is 　　Passage Two

57. 　　How were immigrants viewed by U.S. Congress in early days? 　　(A)They were of inferior races. 　　(B)They were a Source of political corruption. 　　(C)They were a threat to the nation’s security. 　　(D)They were part of the nation’s bloodstream. 　　58.What does the author think of the new immigrants? 　　(A)They will be a dynamic work force in the U.S. 　　(B)They can do just as well as their predecessors. 　　(C)They will be very disappointed on the new land. 　　(D)They may find it hard to fit into the mainstream. 　　59.What does Edward Telles’ research say about Mexican-Americans? 　　(A)They may slowlu improve from generation to generation. 　　(B)They will do better in terms of deucationl attainment. 　　(C)They will melt into the African-American community. 　　(D)They may forever remain poor and underachieving. 　　60.What should be done to help the new immigrants? 　　(A)Rid them of their inferiority complex. 　　(B)Urge them to adopt American customs. 　　(C)prevent them from being marginalized. 　　(D)Teach them standard American English. 　　61.According to the author,the burning issue concerning immigrationg is_______. 　　(A)how to deal with people entering the U.S. without documents 　　(B)how to help immigrants to better fit into American society 　　(C)how to stop illegal immigrants from crossing the corder 　　(D)how to limit the number of immigrants to enter the U.S.

62 (A)retrieves 　　(B)deviates 　　(C)results 　　(D)departs