训练内容：2010职称英语通关训练营第20期—概括大意与完成句子& 阅读理解
训练要求：
一、概括大意与完成句子(第23～30题，每题1分，共8分)
阅读下面这篇短文，短文后有2项测试任务：(1)第 23～26题要求从所给的6个选项中为第2～5段每段选择1个正确的小标题;(2)第27～30题要求从所给的6个选项中选择4个正确选项，分别完成每个句子。请将答案涂在答题卡相应的位置上。
The Role of Governments
1 Governments determine the legal framework that sets the basic meets for the ownership of property and the operation of markets. In addition governments at all levels regulate economic behavior, setting detailed rules for the operation of businesses. Such regulations apply to all businesses;examples include laws against fraud and racial discrimination.
2 Governments buy and produce many goods and services, such as defense, education, parks, and roads, which they provide for firms and households. They typically buy computers but write programs they need to operate them. Governments also produce and sell goods. In many countries the phone company is government?owned, like the electric system.
3 Governments also make transfer payments, such as Social Security and unemployment benefits to individuals. Transfer payments are payments for which no current economic goods or service is provided in return and therefore do not represent expenditure(支出)for the purchase of final products. A firefighter’s salary is not a transfer payment, but welfare benefits are.
4 Governments pay for the goods they buy and for the transfer payments they make mostly by collecting taxes, including personal income taxes, property taxes, social insurance taxes, and sales taxes. Over 60% of the government revenue in the U. S. is collected by the federal government. This does not include taxes collected by state and city governments.
5 Every market economy suffers from business cycles. Governments, through their control of taxes and government spending and through their ability to control the quantity of money, often attempt to modify fluctuations(波动) in the business cycle. For instance, the government may reduce taxes in a recession(萧条)in the hope that people will increase spending and thus raise the GNP.
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27 Governments regulate economic behavior, and the regulations .
28 Besides buying and producing services, governments also .
29 The government revenue in the U. S. is collected by the federal government and .
30 The government may reduce taxes in a recession in order to
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