6.In the United States， the Postal Service has a monopoly on first-class mail， but much of what is sent first class could be transmitted electronically. Electronic transmittal operators argue that if the Postal Service were to offer electronic transmission， it would have an unfair advantage， since its electronic transmission service could be subsidized from the profits of the monopoly.

Which of the following， if each is true， would allay the electronic transmittal operators' fears of unfair competition？

（A） If the Postal Service were to offer electronic transmission， it could not make a profit on first-class mail.

（B） If the Postal Service were to offer electronic transmission， it would have a monopoly on that kind of service.

（C） Much of the material that is now sent by first-class mail could be delivered much faster by special package couriers， but is not sent that way because of cost.

（D） There is no economy of scale in electronic transmission——that is，the cost per transaction does not go down as more pieces of information are transmitted.

（E） Electronic transmission will never be cost-effective for material not sent by first-class mail such as newspaper and bulk mail.

7.Which of the following best completes the passage below？

The computer industry's estimate that it loses millions of dollars when users illegally copy programs without paying for them is greatly exaggerated. Most of the illegal copying is done by people with no serious interest in the programs. Thus， the loss to the industry is much smaller than estimated because

（A） many users who illegally copy programs never find any use for them

（B） most of the illegally copied programs would not be purchased even if purchasing them were the only way to obtain them.

（C） even if the computer industry received all the revenue it claims to be losing， it would still be experiencing financial difficulties.

（D） the total market value of all illegal copies is low in comparison to the total revenue of computer industry.

（E） the number of programs that are frequently copied illegally is low in comparison to the number of programs available for sale

8.Which of the following best completes the passage below？

Sales campaigns aimed at the faltering personal computer market have strongly emphasized ease of use， called user-friendliness. This emphasis is oddly premature and irrelevant in the eyes of most potential buyers， who are trying to address the logically prior issue of whether——。

（A） user-friendliness also implies that owners can service their own computers

（B） personal computers cost more the more user-friendly they are

（C） currently available models are user-friendly enough to suit them

（D） the people promoting personal computers use them in their own homes

（E） they have enough sensible uses for a personal computer to justify the expense of buying one

9.Which of the following best completes the passage below？

At a recent conference on environmental threats to the North Sea， most participating countries favored uniform controls on the quality of effluents， whether or not specific environmental damage could be attributed to a particular source of effluent. What must， of course， be shown， in order to avoid excessively restrictive controls， is that ___________.

（A） any uniform controls that are adopted are likely to be implemented without delay

（B） any substance to be made subject to controls can actually cause environmental damage

（C） the countries favoring uniform controls are those generating the largest quantities of effluents

（D） all of any given pollutant that is to be controlled actually reaches the North Sea at present

（E） environmental damage already inflicted on the North Sea is reversible

10.Which of the following， if true， best completes the argument below？

Comparisons of the average standards of living of the citizens of two countries should reflect the citizens' comparative access to goods and services. Reliable figures in a country's own currency for the average income of its citizens are easily obtained.But it is difficult to get an accurate comparison of average standards of living from these figures. because——。

（A） there are usually no figures comparing how much of two different currencies must be spent in order to purchase a given quantity of goods and services

（B） wage levels for the same job vary greatly from country to country，depending on cultural as well as on purely economic factors

（C） these figures must be calculated by dividing the gross national product of a country by the size of its population

（D） comparative access to goods and services is only one of several factors relevant in determining quality of life

（E） the wealth， and hence the standard of living， of a country's citizens is very closely related to their income

key： ACBCB ABEBA