Which of the following questions does the passage answer explicitly？
A. Why were Black workers excluded from the sample used in Brown's study？
B. Why do private employers discriminate more against women than do government employers？
C. Why do self-employed women have more difficulty than men in hiring high quality employees？
D. Why do suppliers discriminate against self-employed women？
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According to Brown's study, women's earnings categories occur in which of the following orders, from highest earnings to lowest earnings？
A. Government employment, self-employment.
B. Private employment, private employment, self-employment.
C. Private employment, self-employment, government employment.
D. Private employment, government employment, self-employment.
Which. of the following is NOT the reason why people prefer to use virgin' materials than
A. Production costs do not include the true costs of environmental impact.
B. There axe subsidies to virgin materials.
C. Using virgin materials can protect environment.
D. The secondary materials are more expensive.
Which of the following is the fact concerning resource recovery？
A. The solid wastes can be cheaply recycled.
B. Resource recovery has become a significant vein of resource.
C. Governmental intervention is very important to solve the problems of recycling.
D. Solid waste management only involves collection and disposal.
Which of the following is NOT included in the two reports concerned？
A. rents and children should have more right to choose courses.
B. English may.be taught as a second language.
C. Schools should establish a system so that students may be moved into the mainstream as soon as possible.
D. Bilingual education is out of date and should be replaced by a brand-new teaching system.
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