Have you ever experienced tossing and turning (辗转反侧) in bed late at night while counting sheep Do you often rely on sleeping pills About one third of your life is spent asleep, but do you really enjoy good and healthy sleep Unfortunately, about one third of adults suffer from insomnia (失眠症). According to a recent survey taken of 10 000 Shanghai people, more than 70% of locals have sleep disorders of one kind or another. The results show that about 36.5% of interviewees don’t have good sleep; 45.3% wake up very early in the morning and 54.3% feel sleepy during the day. Without drink or food, one can survive for 7 days; but without sleep, one can only last 4 days. Babies sleep for at least 16 hours a day because their brains and bodies develop faster during sleep. After that, the sleep period gets shorter. Beyond the age of 10, most people need fewer than 10 hours sleep a night. For the elderly, 6 or 7 hours is usually enough. High-quality and sufficient sleep ensures an e
A. in poor health
B. physically energetic
C. in good health
D. mentally energetic
Have you ever experienced tossing and turning (辗转反侧) in bed late at night while counting sheep Do you often rely on sleeping pills About one third of your life is spent asleep, but do you really enjoy good and healthy sleep Unfortunately, about one third of adults suffer from insomnia (失眠症). According to a recent survey taken of 10 000 Shanghai people, more than 70% of locals have sleep disorders of one kind or another. The results show that about 36.5% of interviewees don’t have good sleep; 45.3% wake up very early in the morning and 54.3% feel sleepy during the day. Without drink or food, one can survive for 7 days; but without sleep, one can only last 4 days. Babies sleep for at least 16 hours a day because their brains and bodies develop faster during sleep. After that, the sleep period gets shorter. Beyond the age of 10, most people need fewer than 10 hours sleep a night. For the elderly, 6 or 7 hours is usually enough. High-quality and sufficient sleep ensures an e
A. sleeping pills
B. tossing in bed
C. counting in bed
D. turning in bed
Have you ever wondered why different animals or pests have their particular colors Colors in them seem to be used mainly to protect themselves.
Birds, especially seagulls, are very fond of locusts, but birds cannot easily catch locusts because locusts change their colors together with the change of the color of crops. When crops are green, locusts look green. But when crops are ripe, locusts take on exactly the same brown color as crops have. Some other pests with different colors from plants are usually easily found and eaten by their enemies. So they have to hide themselves in terror for lives and appear only at night.
If you study the animal life in any part of the world, you will find the main use of coloring is to protect themselves. Bears, wolves and other beasts move quietly through forests. They are usually invisible to the eyes of hunters, because they have the color much like the barks of trees.
An even more strange act remains to be noticed. A
A. the change of color in locusts
B. the protective coloration of animals and pests
C. how a certain sea fish protects itself
D. animals or pests can dye themselves different colors
Passage 5 Have you ever dreamed of traveling in space It was impossible a hundred years ago, nor was it 50 years ago. With the coming of the Space Age, man’ s dream of visiting the moon has come true. The journey to the moon has been the first step towards future explorations in space. The distance between the moon and the Earth is very short indeed when compared with the distances between Earth and the other planets. Mars, the nearest planet to Earth is of miles away ! Traveling to the planets or travels between planets will be man’ s next aim. Such travels will be more difficult than the trip to the moon and certainly more exciting. Recently, two American unmanned spacecraft, Vikings 1 and 2, landed on Mars in an attempt to discover whether that planet had any life on it. So far the presence of life on Mars has neither been proved nor ruled out. Russian space-probes have discovered that the surface of Venus is so hot that it is almost certain that there is no
A. faster and lighter
B. more convenient and comfortable
C. bigger and lighter
D. quicker and larger
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Have you ever been afraid to talk back when you were treated unfairly Have you ever bought something just because the salesman talked you into it Are you afraid to ask someone for a date
Many people are afraid to assert themselves, Dr. Alberti, author of Stand Up, Speak Out, and Talk Back, thinks it’ s because their self - respect is low. "Our whole set-up is designed to make people distrust themselves, "says Alberti, "There’ s always ’ superior’ around a parent, a teacher, a boss who ’ knows better’. There superiors often gain when they chip away at your self - image."
But Alberti and other scientists are doing something to help people assert themselves. They offer "assertiveness training" courses, AT for short. In the AT courses people learn that they have a right to be themselves. They learn to speak out and feel good about doing so. They learn to be more active without hurt
A. persuade somebody to change his mind
B. answer showing disagreement
C. talk and go back
D. fight bravely
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