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Q18:

The growing popularity of computer-based activities was widely expected to result in a decline in television viewing, since it had been assumed that people lack sufficient free time to maintain current television-viewing levels while spending increasing amounts of free time on the computer.  That assumption, however, is evidently false:  in a recent mail survey concerning media use, a very large majority of respondents who report increasing time spent per week using computers report no charge in time spent watching television.

Which of the following would it be most useful to determine in order to evaluate the argument?

1. Whether a large majority of the survey respondents reported watching television regularly
2. Whether the amount of time spent watching television is declining among people who report that they rarely or never use computers
3. Whether the type of television programs a person watches tends to change as the amount of time spent per week using computers increases
4. Whether a large majority of the computer owners in the survey reported spending increasing amounts of time per week using computers
5. Whether the survey respondents’ reports of time spent using computers included time spent using computers at work

   Answer:

我选E。

答案是E,看文中highlight的部分,题意是人们没有足够的free time来看电视,因为把这些free time都用在电脑上了,那么如果这个survey调查的人都在上班的时候才用电脑,那么他们显然是use computer with no charge in time spent on tv 了，因此，要评价这个survey的有效性,就要看看他调查的人所说的使用电脑的时间是不是在他们的free time