The professional name for covering up a symptom (症状) is “masking” (遮蔽). A headache expert once said, “Masking symptoms is not the best way of treatment.” He compared taking a pain-killer for a headache before a cause is known with taking iron pills for anemia (贫血症) while bleeding continues undiscovered. He added, “Sometimes it is wiser to stand still than to advance in darkness.”

A headache is important also because it affects normal, happy living. The employee with a headache does less work. In a flash of temper he may upset (使心烦意乱) his workmates or customers, causing a direct or indirect loss to his organization. The mother with a headache suffers and disturbs the family. She upsets her husband and children.

29. Which of the following is TRUE according to the passage?

A. Headache has no effect on others.

B. Headache may cover the whole body.

C. Headache is just the tight feeling in the head.

D. Headache may last several minutes or hours.

30. What may the writer talk about in the following paragraph?

A. Treatments of headaches

C. Symptom of headaches

31. The passage mainly tells us .

A. the reason of headache

B. everyone suffers from a headache

C. headache and its effect

（C）

Have you ever wondered?

1. Why do airplanes take longer to fly west than east? It can take five hours to go west-east from New York (NY) to London but seven hours to travel east-west from London to NY. The reason for the difference is an atmospheric phenomenon (大气现象) known as the jet stream (气流). The jet stream is a very high altitude (= above sea level) wind which always blows from the west to the east across the Atlantic. So the planes moving at a constant air speed go faster from the west to the east when they are moving with the wind than in the opposite.

2. What would happen if the gravity on Earth was suddenly turned off?

Supposing we could magically turn off gravity. Would buildings and other buildings float away? What happened would depend on (依靠) how strongly the things were attached (吸附) to the earth. The earth is moving at quite a speed, moving at over a thousand miles per hour. If you turn something around your head on a string, it goes around in a circle until you let go of the string. Then it flies off in a straight line. Turning off gravity would be like letting go of the string. Things not attached to the earth would fly off in a straight line. People in buildings would suddenly off into space.

32. What information can we get from the first part? A. It is the jet stream that affects how fast airplanes fly.

B. Planes go slower when they are moving with the wind. C. It takes more time to fly from NY to London than from London to NY.

D. The jet stream always blows from the east to the west across the Atlantic.

33. The underlined word “” in the 2nd part means “

A. send for B. move quickly C. come out D. grow quickly

34. Which of the following is NOT mentioned in the passage?

A. It takes seven hours to travel from London to New York.

D. a headache is a symptom of something serious B. The definition of headaches D. Bad effects of a headache