1.People who engage in scuba diving are healthier， on average， than people who do not engage in this activity.Therefore， scuba diving tends to promote improved health.
The argument is most vulnerable to criticism on the grounds that it
(A)presupposes that everyone who takes up scuba diving does so solely for health reasons
(B)leads to a further and falsifiable conclusion that no one can achieve good health without engaging in scuba diving
(C)fails to point out that a small number of people are seriously injured in scuba diving accidents each year
(D)treats a precondition for improving one's health as though it were something that by itself could ensure good health
(E)overlooks the possibility that people generally do not take up scuba diving unless they are in good health
2.Which of the following most logically completes the argument below?In recent years， the proportion of car buyers who buy new cars rather than used cars has declined.Some consumers have attributed this change to an increase in new-car prices.As evidence of the price increase，they cite figures that show that， even adjusting for inflation， the price that the buyer of a new car pays，on average， is far higher now than a few years ago.
This evidence is unpersuasive， however， because
(A)the value of a car that is bought new declines much more rapidly than does the value of a car that is bought used
(B)after someone has bought a car， it might be several years before that person next buys a car
(C)a decline in the proportion of car buyers who buy new cars must necessarily mean that the proportion who buy used cars has increased
(D)the relative increase in used-car sales might be explained by the decisions of only a small proportion of all car buyers
(E)the change in the average price paid for a new car could result solely from more people's rejecting inexpensive new cars in favor of used cars.
参考答案：
EE