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听力原文：M: Why did you get up at 6:307 I thought your meeting wasn't until 10:30.
W: I wanted to visit the park before I left. It’s the first time I've seen it.
How much time did she have between her meeting？
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Labor force is defined as being the total number of people who are available to work and earn income. This definition includes everyone who is employed or seeking paid employment, so it includes employees and the self-employed. Labor is one of the country's resources which can be combined with other resources to produce the goods and services required by the community.
Though the size of the workforce relies greatly on the size of the total population, there are several other aspects which also affect it. The age distribution of the total population has a very marked effect on the available workforce. If the population bas a high proportion of very young people or of those too old to work, then the available workforce would be lower than if there were an evenly spread age distribution. If the population grows rapidly from natural in crease, i. e. the number of births greatly exceeds the number of deaths, then as a total population increases the proportion in the workforce declines.
Sometimes a population is described as aging, which means that the birth rate is either falling or growing very slowly, and as people retire from the workforce there are unadequate numbers of young people entering it to take place of those who are leaving it. The population is top-heavy with older people. So the percentage of the population in the workforce declines when there is either a rapid increase in births or a falling birth rate.
The age distribution of the population has several important influences on the economy. If the population is aging and there is an increase in the number of people retiring without a corresponding increase in the number entering the workforce, this raises the problem of the ability of the economy to provide a reasonable level of social services to the retired group. If the aged are to be cared for in special homes or hotels, finance must be available for that purpose. If the size of the workforce is small relative to the total population, then the government tax receipts are relatively low and either the government has less money available to it or the workforce members have to be taxed more heavily.
Labor force is composed of ______.
听力原文：M: Have you ever tasted such perfect apple pie？
W: Even my mother's can't match this!
What does the woman mean？
听力原文：M: Couldn't you have at least tried to argue with the professor about our project？
W: I'm not sure what else I could say. Besides, he did see things our way in the end so let's keep our fingers crossed.
Q: What does the woman imply？
(17)
It is very difficult to evaluate another person's performance objectively. For example, Senta recently wrote irresponsible remarks about her instructor because she was falling to pass the course. Her friend Sam wrote a marvelous description of the same instructor because he received an "A" in the course. Both Senta and Sam were not fairly evaluating the instructor. They were affected by the grades they were earning and were biased in their judgments.
Another irresponsible form. of evaluation occurred when James rated his instructor excellent because the instructor is "easy". He gives few tests and only assigns one paper during the entire term. His lectures are often full of jokes and endless stories. On the other hand, James rated Professor Jones poor because he assigns text work daily, gives pretest and posttest reviews, and packs his lectures with a lot of information.
Student should evaluate their instructors ______.
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