26. Barnes: The two newest employees at this company have salaries that are too high for the simple tasks normally assigned to new employees and duties that are too complex for inexperienced workers. Hence, the salaries and the complexity of the duties of these two newest employees should be reduced.
Which one of the following is an assumption on which Barnes’s argument depends?
A. The duties of the two newest employees are not less complex than any others in the company.
B. It is because of the complex duties assigned that the two newest employees are being paid more than is usually paid to newly hired employees.
C. The two newest employees are not experienced at their occupations.
D. Barnes was not hired at a higher-than-average starting salary.
E. The salaries of the two newest are no higher than the salaries that other companies pay for workers with a similar level of experience.
C: 正确。因为原文中说对于不熟练的员工来说，工资太高了; 并且要降低工作的复杂程度。如果员工胜任的话，why bother? 所以，重要假设就是这些员工在岗位上不胜任。
27. These days, drug companies and health professionals alike are focusing their attention on cholesterol in the blood. The more cholesterol we have in our blood, the higher the risk that we shall die of a heart attack. The issue is pertinent since heart disease kills more North Americans every year than any other single cause. At least three factors---smoking, drinking, and exercise—can each influence levels of the cholesterol in the blood.
Which one of the following can be properly concluded from the passage?
A. If a person has low blood cholesterol, then that person’s risk of fatal heart disease is low.
B. Smoking in moderation can entail as great a risk of fatal heart disease as does heavy smoking.
C. A high-cholesterol diet is the principal cause of death in North America.
D. The only way that smoking increases one’s risk of fatal heart disease is by influencing the levels of cholesterol in the blood.
E. The risk of fatal heart disease can be altered by certain changes in lifestyle.
D. 文中没有说是only way哦。
28. Ordinary mountain sickness, a common condition among mountain climbers, and one from which most people can recover, is caused by the characteristic shortage of oxygen in the atmosphere at high altitudes. Cerebral edema, a rarer disruption of blood circulation in the brain that quickly becomes life-threatening if not correctly treated from its onset, can also be caused by a shortage of oxygen. Since the symptoms of cerebral edema resemble those of ordinary mountain sickness, cerebral edema is especially dangerous at high altitudes.
Which one of the following is an assumption on which the argument depends?
(A) The treatment for ordinary mountain sickness differs from the treatment for cerebral edema.
(B) Cerebral edema can cause those who suffer from it to slip into a coma within a few hours.
(C) Unlike cerebral edema, ordinary mountain sickness involves no disruption of blood circulation in the brain.
(D) Shortage of oxygen at extremely high altitude is likely to affect thinking processes and cause errors of judgment.
(E) Most people who suffer from ordinary mountain sickness recover without any special treatment.
这道题目先讲了ordinary mountain sickness怎么样的，然后又讲了cerebral edema是怎么样，它们两者有共同点就是symptoms of cerebral edema resemble those of ordinary mountain sicknes，所以如果不当心的话，就容易把cerebral edema 看成是ordinary mountain sickness那样的话is especially dangerous at high altitudes.
A. 选项，提出了一个假设，就是他们两者的医疗方法不同，因为如果相同的话，用治疗普通登山症的方法也可以治cerebral edema，就不会有危险了
The answer should be A,
the mountain climber know very well how to treat ordinary mountain sickness, since the symptoms are the alike, if they treat cerebral edema the same way as they treat ordinary mountain sickness, the danger of cerebral edema would be especially dangerous at high altitudes.
B,C :the description of B,C doesn't show any difference on high altitudes.
D : 'thinking processes and cause errors of judgment' were never mentioned in the description. It could be an answer, but the not so good as A.
E didn't answer why 'cerebral edema is especially dangerous at high altitudes'.
29. The price of a full-fare coach ticket from Toronto to Dallas on Breezeway Airlines is the same today as it was a year ago, if inflation is taken into account by calculating prices in constant dollars. However, today 90 percent of the Toronto-to-Dallas coach tickets that Breezeway sells are discount tickets and only 10 percent are full-fare tickets, whereas a year ago half were discount tickets and half were full-fare tickets. Therefore, on average, people pay less today in constant dollars for a Breezeway Toronto-to-Dallas coach ticket than they did a year ago.
Which one of the following, if assumed, would allow the conclusion above to be properly drawn?
(A) A Toronto-to-Dallas full-fare coach ticket on Breezeway Airlines provides ticket-holders with a lower level of service today than such a ticket provided a year ago.
(B) A Toronto-to-Dallas discount coach ticket on Breezeway Airlines costs about the same in constant dollars as they did a year ago.
(C) All full-fare coach tickets on Breezeway Airlines cost the same in constant dollars as they did a year ago.
(D) The average number of coach passengers per flight that Breezeway Airlines carries from Toronto to Dallas today is higher than the average number per flight a year ago.
(E) The criteria that Breezeway Airlines uses for permitting passengers to buy discount coach tickets on the Toronto-to-Dallas route are different today than they were a year ago.
本题所讲的，无非就是，people pay less today in constant dollars，而得出这个结论的证据是，以前10%有打折，现在一半有打折，那么，这个前提就是，他们的价格是一样的，不然，如果涨价，就不可能付的少了
C，full-fare coach tickets cost the same 不等于打折后的也一样
30. Combustion of gasoline in automobile engines produces benzene, a known carcinogen. Environmentalists propose replacing gasoline with methanol, which does not produce significant quantities of benzene when burned. However, combustion of methanol produces formaldehyde, also a know carcinogen. Therefore the environmentalists’ proposal has little merit.
Which one of the following, if true, most supports the environmentalist’ proposal?
A. The engines of some automobiles now on the road burn diesel fuel rather than gasoline.
B. Several large research efforts are under way to formulate cleaner-burning types of gasoline.
C. In some regions, the local economy is largely dependent on industries devoted to the production and distribution of automobile fuel.
D. formaldehyde is a less potent carcinogen than benzene.
E. Since methanol is water soluble, methanol spills are more damaging to the environment than gasoline spills.
题目中Environmentalists propose replacing gasoline with methanol,但有些人认为combustion of methanol produces formaldehyde, also a know carcinogen.所以是不可取
D，说出formaldehyde 比benzene有 less potent carcinogen 那自然这个就是优先选择了