It five or ten years before the new medicine is tested on human beings． A．will take B．took C．takes D．has taken 题目和参考答案——青夏教育精英家教网—

题目内容

It_________five or ten years before the new medicine is tested on human beings．

A．will take B．took C．takes D．has taken

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相关题目

Swimming is one of those activities that can be learned early in life. Little children can learn to swim as soon as they walk. In fact, you need the same skills in walking as in swimming. However, I believe that five is the best age to learn. By five or six, a child knows fear of water, a very important thing to know. It's wise to be afraid, to recognize true danger. Young ones understand that the water can sometimes be very dangerous.

To really benefit from swimming, every swimmer should learn, as soon as possible, these four basic strokes; butterfly, backstroke, Breaststroke, and crawl. I feel that one of these-the breaststroke-is different from the others, since some young swimmers use this stroke naturally, without any training.

In swimming there are certain rules every swimmer should follow:

1). Never swim alone! No matter how good you are in the water, don’t risk drowning by swimming alone. If you swim by yourself, with no life guards or friends with you, you may get into trouble.

2). Don't go beyond your abilities. Most swimmers know enough not to swim too far from the bank or the beach, Showing off by doing dangerous tricks is no good. Swim safely and you will continue to swim and alive.

3). Don't smoke. Swimming depends on a healthy body; good lungs are part of it.

4). Work at any activity that builds muscles.

Little children can learn to swim as soon as _____.

A. they can talk

B. they start walking

C. they have no fear of the water

D. they are five or six years old

The author believes that fear of water is_____.

A. stupid B. sensible C. dangerous D. not smart

The stroke that some young swimmers use first is_____.

A. butterfly B. backstroke C. breaststroke D. crawl

According to the passage, you should not swim alone because_____.

A. the water is too cold

B. your parents would not be happy

C. something in the water might attack

D. you might drown

阅读下面短文并回答问题,然后将答案写到答题卷相应的位置上(请注意问题后的字数要求)。

Swimming is one of those activities that can be learned early in life. Little children can learn to swim as soon as they walk. In fact, you need the same skills in walking as in swimming. However, I believe that five is the best age to learn. By five or six, a child knows fear of water, a very important thing to know. It’s wise to be afraid, to recognize true danger. Young ones understand that the water can sometimes be very dangerous.

To really benefit from swimming, every swimmer should learn ____________：butterfly, backstroke, breaststroke, and crawl. I feel that one of these—the breaststroke—is different from the others, since some young swimmers use this stroke naturally, without any training.

In swimming, there are certain rules every swimmer should follow:

(1) Never swim alone! No matter how good you are in the water, don’t risk drowning by swimming alone. If you swim by yourself, with no life guards or friends with you, you may get into trouble.

(2) Don’t go beyond your abilities. Most swimmers know enough not to swim too far from the bank or the beach. Showing off by doing dangerous tricks is no good. Swim safely and you will continue to swim and alive.

(3) Don’t smoke. Swimming depends on a healthy body; good lungs are part of it.

(4) Work at any activity that builds muscles.

1.What is the main idea of the passage? (no more than 10 words)

___________________________________________________________

2.Please complete the following statement with proper words. (no more than 5 words)

__________________________and the recognition of its danger are sensible.

3.Fill in the blank in Paragraph 2 with proper words. (no more than 7 words)

_______________________________________________________________

4.Why should not you swim alone according to the passage? ( no more than 10 words)

_________________________________________________________________

5.What does the underlined word “it” refer to? (no more than 3 words)

________________________________________________________________

It is natural that children are curious about the world around them. For example, they want to know how their hearts beat. They want to know why the ocean water tastes salty.

　　As children grow up, they become curious about different kinds of things. When they are babies, they are interested in the parts of their bodies and in the smiles of their mothers. They become interested in the physical world around them: the plants, the animals, the sky. Later, they become interested in the things that people have made: wheels, bicycles, cars. And when they are adults, their curiosity continues. Sometimes this curiosity leads to a career (生涯、职业) in science.

　　Scientists spend their lives trying to find out about the world．Those who work with the earth sciences study the earth, the oceans, and the skies. Other scientists who study living things work with the biological sciences. A third group of scientists study the physical sciences, e. g. physics, chemistry.

　　These scientists have already discovered a lot about our world．For example, they tell us why your heart beats fast when you run. They say that when you are quiet, your heart normally beats sixty-five or seventy-five times a minute. Your heart is a pump (泵) that pumps blood to all parts of the body. The blood carries oxygen and nutrition. When you run, your muscles work very hard and use the nutrition that the blood carries to them. The muscles need oxygen, too . So your brain sends a signal to the heart. The signal means that the muscles need more nutrition and oxygen. Then the heart beats fast and sends blood quickly to the muscles. It may beat 90 to 140 times a minute.

　　Of course, scientists cannot answer all of our questions. If we ask, “Why does the ocean water taste salty” scientists will say that the salt comes from rocks. When a rock gets very hot or very cold, it cracks. Rain falls into cracks. The rain then carries the salt into the earth and into the rivers. The rivers carry the salt into the ocean. But then we ask , “What happens to the salt in the ocean? The ocean does not get saltier every year.” Scientists are not sure about the answer to this question.

　　We know a lot about our world, but there are still many answers that we do not have, and we are curious.

1.According to the passage, which of the following statements is true?

　 A．People of different ages are interested in different things

　 B．People in different countries are interested in different things.

　 C．Men and women are curious about different things.

　 D．People are curious in the same way.

2.Scientists who work with the biological sciences study____.

A．the earth , the oceans and the sky B．plants and animals

C．man-made things D．ocean water

3.When you run, your muscles need ____.

A．more nutrition and oxygen B．more signals C．more salt D．water

4.A rock cracks _____.

A．in wet regions B．in dry regions

C．at very high or very low temperatures D．when salty water falls in

5.People are always curious because ____.

A．they cannot explain many things B．they know nothing about the world

C．they know little about the world D．they want to be scientists

It_________five or ten years before the new medicine is tested on human beings.

[ ]

A. will take
B. took
C. takes
D. has taken

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