[单项选择]
Most Americans today have some insurance against long-term illness or injury, or the death of the family wage-earner. Nearly all who work, including the self-employed, are covered by retirement programs. Four out of five employees now have access to unemployment benefits.
The Social Security law, which covers more than 90 percent of the work force, provides a national system of payments in old age and disability benefits. Over the years the law has been broadened’ to give greater protection in all categories.
The Social Security system is financed through a tax paid by workers and their employers during the years of employment. Self-employed persons, who also pay into the system, are covered as well. When workers retire at age 65, they receive monthly payments on a scale to their previous earnings; reduced benefits am paid to those retiring at ages 62 through 64. Benefits are also paid to nonworking widows and widowers, to children under 18 and to dependent
A. the Social Security law
B. the social security and insurance system
C. unemployment insurance
D. retirement benefits

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[单项选择]

Most Americans today have some insurance against long-term illness or injury, or the death of the family wage-earner. Nearly all who work, including the self-employed, are covered by retirement programs. Four out of five employees now have access to unemployment benefits.
The Social Security law, which covers more than 90 percent of the work force, provides a national system of payments in old age and disability benefits. Over the years the law has been broadened’ to give greater protection in all categories.
The Social Security system is financed through a tax paid by workers and their employers during the years of employment. Self-employed persons, who also pay into the system, are covered as well. When workers retire at age 65, they receive monthly payments on a scale to their previous earnings; reduced benefits am paid to those retiring at ages 62 through 64. Benefits are also paid to nonworking widows and widowers, to children under 18 and to dependent
A. taxes for social security
B. a tax for unemployment insurance
C. for the group health program
D. for the pension system

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[单项选择]　Health Insurance(保险) 　　Most Americans are responsible for their own medical costs.These can be extremely high if a person gets very(51)or has an accident.So people buy a health insurance plan to make sure these costs will be(52). 　　Most American colleges and universities have(53)health centers.There may even be a teaching hospital that can treat more serious(54). 　　Some medical services may be included in the cost of attending a school.But health insurance is usually needed for extra services.(55)most full-time college students must have insurance. 　　Students may already be protected under their family’s health plan.If not,many colleges offer(56)own plans. 　　The University of Michigan will be our example.Students pay a health service fee.Then there is no extra charge when they are treated for minor(57)problems at the University Health Center.But the school wants students to have health insurance to pay(58)other services. 　　The insurance plan(59)by the university costs abou
A. rich
B. poor
C. sick
D. old

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Perhaps like most Americans you have some extra pounds to{{U}} (47) {{/U}}. You may even have tried a fad diet or two, but found yourself right back where you started. The key to weight loss is regular{{U}} (48) {{/U}}activity. And surprisingly, you don’t have to give up eating or make the gym your second home to see long-term,{{U}} (49) {{/U}}effects.
Your body needs a certain amount of energy to maintain basic{{U}} (50) {{/U}}such as breathing, blood circulation and digestion. The energy required to keep your organs functioning is referred to as the resting or basal metabolic rate.
Any time you are active,{{U}} (51) {{/U}}energy is required. It is obtained from glycogen and fat stored in the blood, liver, and muscles. The key to losing weight is to draw on the fat rather than on the carbohydrate reserves.
Which of the two energy sources you use depends on the intensity and {{U}} (52) {{/U}}of your activity. The high

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