[单项选择]Being colleagues for ten years, they have become (intimate) friends.
A. close
B. new
C. kind
D. closely

[单项选择]Being colleagues for ten years, they have become (intimate) friends.
A. close
B. new
C. kind
D. closely

[单项选择]In the past ten years, there have been several improvements in mountain-climbing equipment. These improvements have made the sport both safer and more enjoyable for experienced climbers. Despite these improvements, however, the rate of mountain-climbing injuries has doubled in the past ten years.
If all of the statements above are true, which of the following, if true, best reconciles their apparent discrepancy ？（）
A. Many climbers, lulled into a false sense of security, use the new equipment to attempt climbing feats of which they are not capable.
B. Some mountain-climbing injuries are caused by unforeseeable weather conditions.
C. Mountain climbing, although a dangerous sport, does not normally result in injury to the experienced climber.
D. In the past ten years there have been improvements in mountain-climbing techniques as well as in mountain-climbing equipment.
E. Although the rate of mountain-climbing injuries has increased, the rate of mountain-climbing deaths has not changed.

[单项选择]

Although recent years have seen substantial reductions in noxious pollutants from individual motor vehicles, the number of such vehicles has been steadily increasing. Consequently more than 100 cities in the United States still have levels of carbon monoxide, particulate matter, and ozone (generated by photochemical reactions with hydrocarbons from vehicle exhaust) that exceed legally established limits. There is a growing realization that the only effective way to achieve further reductions in vehicle emissions--short of a massive shift away from the private automobile—is to replace conventional diesel fuel and gasoline with cleaner-burning fuels such as compressed natural gas, liquefied petroleum gas, ethanol, or methanol.
All of these alternatives are carbon-based fuels whose molecules are smaller and simpler than those of gasoline. These molecules burn mom cleanly than gasoline, in part because they have fewer, if any, carbon-carbon bonds, and the hydrocarbons t
A. countering a flawed argument that dismisses a possible solution to problem
B. reconciling contradictory points of view about the nature of a problem
C. identifying the strengths of possible solutions to a problem
D. discussing a problem and arguing in favor of one solution to it

[单项选择]Recent years have brought minority-owned businesses in the United States unprecedented opportunities--as well as new and significant risks. Civil right activists have long argued that one of the principal reasons why Blacks, Hispanics and other minority groups have difficulty establishing themselves in business is that they lack of access to the sizable orders and subcontracts that are generated by large companies. Now Congress, in apparent agreement, has required by law that businesses awarded federal contracts of more than $ 500, 000 do their best to find minority subcontractors and record their efforts to do so on forms filed with the government. Indeed, some federal and local agencies have gone so far as to set specific percentage goals for apportioning parts of public works contracts to minority enterprises.
Corporate response appears to have been substantial. According to figures collected in 1977, the total of corporate contracts with minority businesses rose from $ 77 mill
A. present a commonplace idea and its inaccuracies.
B. describe a situation and its potential drawbacks.
C. propose a temporary solution to a problem.
D. analyze a frequent source of disagreement.