摘要：1．( )Six fish are in a jar, if one of them is dead(), how many will be left there? A. 0 B. 1 C. 5 D. 6
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Napoga is a 12-year-old girl in Ghana(加纳)，Africa. It is hard for her family to get clean water. Every morning，she leaves home at half past five to get clean water for her family in a village far away. It takes her six hours to get enough clean water for daily cooking and drinking. She has no time to go to school or to play with her friends. Millions of people in the world are like Napoga. They can't get enough clean water to keep healthy.
Earth Day is April 22. But on all other days，we must also remember it. The water we use is the most important natural resource(自然资源) on the earth.
Water covers 70% of the earth's surface. But most of that is sea water. We can't use it for very many things. Fresh water covers only 1% of the earth's surface.
You probably feel lucky that your life isn't as hard as Napoga's. But that doesn't mean you don't have to worry about water. We all face serious water problems. One of them is water pollution. All kinds of things from cars，factories，farms and homes make our rivers，lakes，and oceans dirty. Polluted water is very bad for people to drink. And dirty water is bad for fish，too. Now, 34% of all kinds of fish are dying out.
How do cars and factories make our water dirty？First，they pollute the air. Then，when it rains，the rain water comes down and makes our drinking water dirty. Dirty rain，called acid rain(酸雨)，is also bad for plants，animals and buildings.
Scientists say that in 30 years，more than half of the people in the world won't have enough clean water. We have to learn how to save more water for ourselves and our children. Here is some advice for saving water：
●Turn off the water while you brush your teeth. You can save as much as 450 liters(升) each month.
●Leaky taps(漏水的龙头) waste a lot of water. Fix them right away！
●You can easily cut your 10-minute showers in half----and you'll be just as clean.
●When you wash dishes，don't let the water run.
●Only wash clothes when you have a lot to wash. If your washing machine isn't full，you're wasting water！
【小题1】On the earth，_______.
| A．sea water is more widely(广泛地) used than fresh water |
| B．there is very little water for our living |
| C．there is 71% of fresh water |
| D．we don't need to worry about water |
| A．is only bad for living things |
| B．can be produced in factories |
| C．doesn't do harm(伤害) to people，but it's bad for plants，animals and buildings |
| D．doesn't just do harm to human beings but to animals，plants and buildings |
| A．We need ten minutes if we want a clean shower. |
| B．We should put in enough clothes when we wash them in washing machines. |
| C．You can keep yourself clean by having a shower for five minutes. |
| D．Don't let the water run when we brush our teeth and wash dishes. |
| A．Something must be done to prevent water from being polluted. |
| B．Clean water means much to human beings and living things around us. |
| C．It's time to take care of the water we use. |
| D．Water is the most important natural resource on the earth. |
Napoga is a 12-year-old girl in Ghana(加纳)，Africa. It is hard for her family to get clean water. Every morning，she leaves home at half past five to get clean water for her family in a village far away. It takes her six hours to get enough clean water for daily cooking and drinking. She has no time to go to school or to play with her friends. Millions of people in the world are like Napoga. They can't get enough clean water to keep healthy.
Earth Day is April 22. But on all other days，we must also remember it. The water we use is the most important natural resource(自然资源) on the earth.
Water covers 70% of the earth's surface. But most of that is sea water. We can't use it for very many things. Fresh water covers only 1% of the earth's surface.
You probably feel lucky that your life isn't as hard as Napoga's. But that doesn't mean you don't have to worry about water. We all face serious water problems. One of them is water pollution. All kinds of things from cars，factories，farms and homes make our rivers，lakes，and oceans dirty. Polluted water is very bad for people to drink. And dirty water is bad for fish，too. Now, 34% of all kinds of fish are dying out.
How do cars and factories make our water dirty？First，they pollute the air. Then，when it rains，the rain water comes down and makes our drinking water dirty. Dirty rain，called acid rain(酸雨)，is also bad for plants，animals and buildings.
Scientists say that in 30 years，more than half of the people in the world won't have enough clean water. We have to learn how to save more water for ourselves and our children. Here is some advice for saving water：
●Turn off the water while you brush your teeth. You can save as much as 450 liters(升) each month.
●Leaky taps(漏水的龙头) waste a lot of water. Fix them right away！
●You can easily cut your 10-minute showers in half----and you'll be just as clean.
●When you wash dishes，don't let the water run.
●Only wash clothes when you have a lot to wash. If your washing machine isn't full，you're wasting water！
【小题1】On the earth，_______.
| A．sea water is more widely(广泛地) used than fresh water |
| B．there is very little water for our living |
| C．there is 71% of fresh water |
| D．we don't need to worry about water |
| A．is only bad for living things |
| B．can be produced in factories |
| C．doesn't do harm(伤害) to people，but it's bad for plants，animals and buildings |
| D．doesn't just do harm to human beings but to animals，plants and buildings |
| A．We need ten minutes if we want a clean shower. |
| B．We should put in enough clothes when we wash them in washing machines. |
| C．You can keep yourself clean by having a shower for five minutes. |
| D．Don't let the water run when we brush our teeth and wash dishes. |
| A．Something must be done to prevent water from being polluted. |
| B．Clean water means much to human beings and living things around us. |
| C．It's time to take care of the water we use. |
| D．Water is the most important natural resource on the earth. |
| 主观性阅读。 | ||||||||||||||||||||||||
| Stories of animals ①Bill Bowell, was suffering from depression(抑郁症). The doctor gave him some medicine, but it didn't help, and he was unable to work for twelve years. Then he decided to swim with dolphins.. " My life has changed," says Bowell. " A dolphin named Simo looked into my eyes for a few minutes and started to cry. All my strong feelings came out suddenly like a volcano(火山). As I cried, Simo put his head on my chest(胸部) kept very quiet." After swimming with dolphins, Bowell says he has fully got well. ② In France, a man had to move to a new job two hundred kilometers away. He had a dog and a cat, and he loved them both. But he thought that the cat prefer to stay in the same house with the new owners. So he moved and took only the dog.. About three weeks later, the dog was suddenly lost. For several days, the man looked for his dog, but didn't find him. Then , seven weeks later the dog came back but he was not alone. By his side was the cat. they were tired and hungry after their long trip, and there was something wrong with the cat's paws(爪子). But they got well quickly and were never separated(分离) again. ③ people say that fish are cold, but this story shows that they have feelings, too. A friend was moving to another country, so I took her pet goldfish and put it in a bowl with our goldfish. They lived together for six months, and when the friend came back, we separated them again, and she took her goldfish home. I found that my goldfish was acting strangely, hitting against the side of the bowl. The next morning he was dead. Later that day, my friend phoned to say that her goldfish was also dead. I believe they died of a broken heart. | ||||||||||||||||||||||||
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Napoga is a 12-year-old girl in Ghana, Africa. It is hard for her family to get clean water. Every morning, she leaves home at half past five to get clean water for her family in a village far away. It takes her six hours to get enough clean water for daily cooking and drinking. She has no time to go to school or to play with her friends. Millions of people in the world are like Napoga. They can’t get enough clean water to keep healthy.
Earth Day is April 22. But on all other days, we must also remember it. The water we use is the most important natural resource on the earth.
Water covers 70% of the earth’s surface. But most of that is sea water. We can’t use it for very many things. Fresh water covers only 1% of the earth’s surface. You probably feel lucky that your life isn’t as hard as Napoga’s. But that doesn’t mean you don’t have to worry about water. We all face serious water problems. One of them is water pollution. All kinds of things from cars, factories, farms and homes make our rivers, lakes, and oceans dirty. Polluted water is very bad for people to drink. And dirty water is bad for fish, too. Now, 34% of all kinds of fish are dying out. How do cars and factories make our water dirty? First, they pollute the air. Then, when it rains, the rain water comes down and makes our drinking water dirty. Dirty rain called acid rain(酸雨), is also bad for plants, animals and buildings. Something must be done to prevent water form being polluted.
Scientists say that in 30 years, more than half of the people in the world won’t have enough clean water. We have to learn how to save more water for ourselves and our children. Here is some advice for saving water:
●Turn off the water while you brush your teeth. You can save as much as 450 liters(升) each month.
●Leaky taps(漏水的龙头) waste a lot of water. Fix them right away!
●You can easily cut your 10-minute showers in half—and you’ll be just as clean.
●When you wash dishes, don’t let the water run.
●Only wash clothes when you have a lot to wash. If your washing machine isn’t full, you’re wasting water!
Earth Day is April 22. But on all other days, we must also remember it. The water we use is the most important natural resource on the earth.
Water covers 70% of the earth’s surface. But most of that is sea water. We can’t use it for very many things. Fresh water covers only 1% of the earth’s surface. You probably feel lucky that your life isn’t as hard as Napoga’s. But that doesn’t mean you don’t have to worry about water. We all face serious water problems. One of them is water pollution. All kinds of things from cars, factories, farms and homes make our rivers, lakes, and oceans dirty. Polluted water is very bad for people to drink. And dirty water is bad for fish, too. Now, 34% of all kinds of fish are dying out. How do cars and factories make our water dirty? First, they pollute the air. Then, when it rains, the rain water comes down and makes our drinking water dirty. Dirty rain called acid rain(酸雨), is also bad for plants, animals and buildings. Something must be done to prevent water form being polluted.
Scientists say that in 30 years, more than half of the people in the world won’t have enough clean water. We have to learn how to save more water for ourselves and our children. Here is some advice for saving water:
●Turn off the water while you brush your teeth. You can save as much as 450 liters(升) each month.
●Leaky taps(漏水的龙头) waste a lot of water. Fix them right away!
●You can easily cut your 10-minute showers in half—and you’ll be just as clean.
●When you wash dishes, don’t let the water run.
●Only wash clothes when you have a lot to wash. If your washing machine isn’t full, you’re wasting water!
Fishing is a popular activity and every fisherman knows the rule: Keep the big ones, throw the smaller ones back. The idea behind Lt is simple - the larger fish are probably older. If you keep the smaller ones, they won’t be able to reproduce, and the fish population is in danger.
But fishing out the largest fish from a population has an unwanted effect: Over time, fewer adult fish get really big. If only the smaller fish reproduce（繁殖）, then future generations become smaller. This is an example of evolution（进化） in action.
One scientist, Dr David Conover has spent the last decade studying the effects of the “keep the big ones” rule and if they can be reversed（颠倒）.
To set up his experiment, Conover and his team caught hundreds of silverside fish and divided them into six groups. For two groups, Conover followed the “keep the large ones” rule and took out the biggest fish. For two other groups, he removed only the small fish.
For the last two groups, he removed fish at random (随意的).
After five years, he measured the fish in each group. In the two groups where the largest fish were regularly removed, the average fish size was smaller than the average size in the other groups. Here was evolution in action: If only small fish survive to reproduce, then future generations of fish will also tend to be small.
For the second five years of his experiment, Conover changed the rules and took fish randomly from each group. At the end of the experiment, he found that the fish that were in the “keep the large ones” group for the first five years had started to get larger again, although he calculated it would take at least 12 years for the fish in that group to return to their original size.
In other words, it takes less time to shrink(变小) than it does to recover.
小题1: The underlined word “it” (Line 2) refers to “ ”
小题2:Why do many people follow the “keep the big ones, throw the small ones back” rule?
小题3:What did Conover find after the first five years of his experiment?
小题4: What is the author’s intention in writing this article?
But fishing out the largest fish from a population has an unwanted effect: Over time, fewer adult fish get really big. If only the smaller fish reproduce（繁殖）, then future generations become smaller. This is an example of evolution（进化） in action.
One scientist, Dr David Conover has spent the last decade studying the effects of the “keep the big ones” rule and if they can be reversed（颠倒）.
To set up his experiment, Conover and his team caught hundreds of silverside fish and divided them into six groups. For two groups, Conover followed the “keep the large ones” rule and took out the biggest fish. For two other groups, he removed only the small fish.
For the last two groups, he removed fish at random (随意的).
After five years, he measured the fish in each group. In the two groups where the largest fish were regularly removed, the average fish size was smaller than the average size in the other groups. Here was evolution in action: If only small fish survive to reproduce, then future generations of fish will also tend to be small.
For the second five years of his experiment, Conover changed the rules and took fish randomly from each group. At the end of the experiment, he found that the fish that were in the “keep the large ones” group for the first five years had started to get larger again, although he calculated it would take at least 12 years for the fish in that group to return to their original size.
In other words, it takes less time to shrink(变小) than it does to recover.
小题1: The underlined word “it” (Line 2) refers to “ ”
| A．the activity | B．the fish |
| C．the rule | D．the fisherman |
| A．It helps to protect fish numbers. |
| B．It helps to protect fish size. |
| C．It is the custom in most countries. |
| D．They will be punished if they don’t. |
| A．The “keep the big ones” rule made no difference to fish size. |
| B．The “keep the big ones” rule made fish smaller on average. |
| C．The “keep the big ones” rule made the fish bigger on average. |
| D．The “keep the big ones” rule affected all fish populations in the same way. |
| A．To encourage people to fish more carefully. |
| B．To urge governments to change the rules of fishing. |
| C．To describe the results of a scientific experiment. |
| D．To introduce the rules of fishing to readers. |