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e sun because of the distance between the earth and the sun.
A Right B Wrong C Not mentioned
18 The sound of thunder always follows the lightning flash because the sound of thunder travels more slowly through the air. 
A Right B Wrong C Not mentioned
19 The research of sound is important to us.
A Right B Wrong C Not mentioned
20 The speed at which sound travel through the air at ordinary temperature is about 1, 100 feet per minute.
A Right B Wrong C Not mentioned
21 Our eyes are keener than our ears.
A Right B Wrong C Not mentioned
22 The speed of sound increases with a rise in temperature.
A Right B Wrong C Not mentioned
第3部分：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1～4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。
Health Insurance
1 All insurance is a form of risk management. To deal with the unexpected risks to health through accident or illness, various types of health insurance programs have been devised. Health insurance is offered to individuals in two forms:individual plans and group plans. The insurers(供保者)may be private companies or governments. Since the early 1970s another type of health-care coverage(承保险种) has become prominent:the health maintenance organization. 
2 In some countries no insurance companies offer health care because governments have taken over the entire responsibility. The United States has a combination of private and government-sponsored insurance. Some government programs are limited to specific groups within the population. 
3 The purpose of health insurance is to provide protection against loss of income and to cover the expenses of hospitalization(住院) and some of its associated costs. Some policies also help the people of disability, and this will pay insured individuals should they be unable to work because of extended illnesses or permanent physical disability. Accident insurance covers sudden and unexpected injuries, while sickness insurance applies to illness or disease. There are policies that cover /www.yingyukaoshi.com/ accidents only, while normal health insurance covers accidents as well as illness. Some policies are designed only to provide extra income during hospitalization. Many of these are known as mail-order policies, because they are sold to individuals who answer mailed requirement or reply to ads in newspapers and magazines or on television. 
4 Health insurance covers a lot of costs. Some policies cover a stay in the hospital and services offered by the hospital. Surgical expense coverage provides benefits for surgery resulting from illness or accident. Beyond this, a policy may cover what are called regular Medical expenses, including doctor’s fees, home nursing, diagnostic tests, and ambulance service. 
23 Paragraph 1 
24 Paragraph 2 
25 Paragraph 3 
26 Paragraph 4 
A The Importance of Health Insurance
B The Definition of Health Insurance
C The Purpose of Each Kind of Health Insurance
D InSomeCountriesThere Are No Health Care
E Health Insurance Covers a Lot of Costs
F The Advantages of Health Insurance
27 The insurers of health insurance may be . 
28 Accident insurance covers . 
29 Sickness insurance applies to .
30 Doctor’s fees is a kind of .
A private companies or governments
B sudden and unexpected injuries
C illness or disease
D regular medical expenses
E