2008年12月六级真题及答案(A卷)(10)

2008年12月六级真题及答案(A卷)

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

Questions 57 to 61 are based on the following passage

The percentage of immigrants(including those unlawfully present) in the United states has been creeping upward for years. At 12.6 percent, it is now higher than at any point ince the mid1920s

We are not about to go back to the days when Congress openly worried about inferior races polluing

America’s bloodstream. But once again we are wondering whether we have too many of the wrong sort fo

necomers.Their loudest citecs argue that the new wave of immigrants cannot,and indeed do not want to, fit in as previous generations did.

We now know that these racist views were wrong.In time, Italians, Romanians and members of other so-called inferior races became exemplary Americans and contributed greatly, in ways too numerous to detail , to the building of this magnificent nation. There is no reason why these new immigrants should not have the same success.

Although children of Mexican immigrants do better, in terms of educational and professional attainment, than thir parents UCLA sociologist Edward Telles has found that the gains don’t continme. Indeed, the fouth generation is marginally worse off than the third James Jackson,of the University of Michigan,has foud a simila rend among black Caribbean immigrants,Tells fears that Mexican-Americans may be fated to follow in the footsteps of American