1. After the national speed limit of 55 miles per hour was imposed in 1974, the number of deaths per mile driven on a highway fell abruptly as a result. Since then, however, the average speed of vehicles on highways has risen, but the number of deaths per mile driven on a highway has continued to fall.

Which of the following conclusions can be properly drawn from the statements above?

(A) The speed limit alone is probably not responsible for the continued reduction in highway deaths in the years after 1974.

(B) People have been driving less since 1974.

(C) Driver-education courses have been more effective since 1974 in teaching drivers to drive safely.

(D) In recent years highway patrols have been less effective in catching drivers who speed.

(E) The change in the speed limit cannot be responsible for the abrupt decline in highway deaths in 1974.

（A）

为什么不选(E)?我觉的两个答案差不多。。。

5. The city’s public transportation system should be removed from the jurisdiction of the municipal government, which finds it politically impossible either to raise fares or to institute cost-saving reductions in service. If public transportation were handled by a private firm, profits would be vigorously pursued, thereby eliminating the necessity for covering operating costs with government funds.

The statements above best support the conclusion that

(A) the private firms that would handle public transportation would have experience in the transportation industry

(B) political considerations would not prevent private firms from ensuring that revenues cover operating costs

(C) private firms would receive government funding if it were needed to cover operating costs

(D) the public would approve the cost-cutting actions taken by the private firm

(E) the municipal government would not be resigned to accumulating merely enough income to cover costs

（B）这题偶不太懂意思，(D)为什么不行呢？

8. Teenagers are often priced out of the labor market by the government-mandated minimum-wage level because employers cannot afford to pay that much for extra help. Therefore, if Congress institutes a subminimum wage, a new lower legal wage for teenagers, the teenage unemployment rate, which has been rising since 1960, will no longer increase.

Which of the following, if true, would most weaken the argument above?

(A) Since 1960 the teenage unemployment rate has risen when the minimum wage has risen.

(B) Since 1960 the teenage unemployment rate has risen even when the minimum wage remained constant.

(C) Employers often hire extra help during holiday and warm weather seasons.

(D) The teenage unemployment rate rose more quickly in the 1970’s than it did in the 1960’s

(E) The teenage unemployment rate has occasionally declined in the years since 1960.

.（B）

这题偶也不太懂意思，why not (A)?

10. This year the New Hampshire Division of Company X set a new record for annual sales by that division. This record is especially surprising since the New Hampshire Division has the smallest potential market and the lowest sales of any of Company X’s divisions.

Which of the following identifies a flaw in the logical coherence of the statement above?

(A) If overall sales for Company X were sharply reduced, the New Hampshire Division’s new sales record is irrelevant to the company’s prosperity.

(B) Since the division is competing against its own record, the comparison of its sales record with that of other divisions is irrelevant.

(C) If this is the first year that the New Hampshire Division has been last in sales among Company X’s divisions, the new record is not surprising at all.

(D) If overall sales for Company X were greater than usual, it is not surprising that the New Hampshire Division was last in sales

(E) Since the New Hampshire Division has the smallest potential market, it is not surprising that it had the lowest sales.

.（B）

我觉得(B)(D)都对。。。

谢谢了~~~

1. After the national speed limit of 55 miles per hour was imposed in 1974, the number of deaths per mile driven on a highway fell abruptly as a result. Since then, however, the average speed of vehicles on highways has risen, but the number of deaths per mile driven on a highway has continued to fall.

Which of the following conclusions can be properly drawn from the statements above?

(A) The speed limit alone is probably not responsible for the continued reduction in highway deaths in the years after 1974.

(B) People have been driving less since 1974.

(C) Driver-education courses have been more effective since 1974 in teaching drivers to drive safely.

(D) In recent years highway patrols have been less effective in catching drivers who speed.

(E) The change in the speed limit cannot be responsible for the abrupt decline in highway deaths in 1974.

（A）

为什么不选(E)?我觉的两个答案差不多。。。

先说这个吧，注意A是“after 1974”，E是“in 1974”，所指年份完全不同。

题目里面“as a result”已说明在1974年限速和死亡率下降是因果关系，而E与之相反，因此排除E.