1. People once thought lightning came from ________.

　 A. the sky　　　　　　 B. the gods　　　　 C. the earth　　　　　 D. nature

64、(1分)

　　 In earliest times, men considered lightning to be one of the great mysteries (神秘的事物) of nature. Some ancient peoples believed that lightning and thunder were the weapons (武器) of the gods.

　　 In reality, lightning is a flow of electricity formed high above the earth. A single flash of lightning 1.6 kilometres long has enough electricity to light one million light bulbs (灯泡).

　　 The American scientist and statesman, Benjamin Franklin, was the first to show the connection between electricity and lightning in 1752. In the same year he also built the first lightning rod (避雷针). This device (装置物) protects buildings from being damaged by lightning.

　　 Modern science has discovered that one stroke (闪击) of lightning has a voltage (电压) of more than 15 million volts (伏特). A flash of lightning between a cloud and the earth may be as long as 13 kilometers, and travel at a speed of 30 million meters per second.

　　 Scientists judge that there are about 2,000 million flashes of lightning per year. Lightning hits the Empire State Building in New York City 30 to 48 times a year. In the United States alone it kills an average (平均数) of one person every day.

　　 The safest place to be in case of an electrical storm is in a closed car. Outside, one should go to low ground and not get under tress. Also, one should stay out of water and away from metal fences. Inside a house, people should avoid open doorways and windows and not touch wires or metal things.

　　 With lightning, it is better to be safe than sorry?

4. Obviously the medicine　　　 .

　 A. may be dangerous to small children.

　 B. cannot be taken by children under twelve years old.

　 C. may be taken by children but not by grown-ups.

　 D. may be taken by grown-ups but not by children.

3. If one cannot sleep, it is suggested that he　　　 .

A. take two tablets before going to bed.　 B. take less than two tablets before going to bed.

C. stop taking the medicine.　　　　　 D. ask advice of a doctor.

2. We can infer from the directions that　　 .

　 A. the medicine could cause some people to feel nervous.

　 B. children may take the same amount that grown-ups take.

　 C. one may not take this medicine before going to bed.

　 D. the medicine is a liquid.

1. The directions on this medicine bottle clearly warn the patient not to take more than　　　 .

　 A. twenty-four tablets a day.　　　　　　 B. eight tablets a day.

　 C. six tablets a day.　　 　　　　　　　　　D. three tablets a day.

63、(1分)

　　 Read the following directions on a bottle of medicine：

　　 “Take two tablets(药片)with water, followed by one tablet every eight hours, as required, For maximum(最大量) night-time and early morning relief(缓解疼痛), take two tablets at bed - time, Do not take more than six tablets in twenty-four hours.

　　 For children six to twelve years old, give half the amount for a grownup. For children under six years old, ask for your doctor’s advice.

　　 Reduce the amount if nervousness, restlessness, or sleeplessness occurs,”

5. AI Herpin’s condition could be regarded as ______.

　 A. a common one　　　　　　　　　　　 B. one that could be cured

　 C. very healthy　　　　　　　　　　　　 D. a rare one

4. One reason that might explain Herpin’s sleeplessness was ________.

　 A. that he hadn’t got a bed　　　　　　　　 B. that he had gradually got rid of the sleeping habit

　 C. his mother’s injury before he was born　　 D. his magnificent physical condition

3. After watching him closely, the doctors came to believe that AL Herpin ________.

　 A. was too old to need any sleep　　　　　　 B. often slept in a chair

　 C. needed no sleep at all　　　　　　　　　 D. needed some kind of sleep