The Grand Canyon（科罗拉多大峡谷） is a large river canyon in Arizona． It is over220 miles long and over a mile deep in some places． Its widest point is 18 miles wide． The canyon is considered one of the Seven Natural Wonders of the World．
Over millions of years， the Colorado River wore away rocks as it passed through the area．Slowly， the river made the path deeper and deeper． Now， the canyon is surrounded by steep walls on either side， while the river continues to flow at the bottom of the canyon．
Besides its large size，the Grand Canyon is also known for its magnificent colors．The canyon is made of layers of rock（岩层）， and each layer of rock has a different depth and color．Geologists have identified almost 40 different layers of rock exposed by the rivers erosion．
The climate in canyon area is primarily desert， with both high and low temperatures． The upper rims of the canyon often receive snowfall．The air quality is usually very high，although dust storms and smoke from fires can change the air．
The Grand Canyon is home to a variety of plants and animals． Plants range from various species of cactus pine forests． Many types of animals live in the area，including the bald eagle，bobcats，bats and gila monsters．Six different kinds of rattlesnakes have been found in the area．
Today， the canyon is part of the Grand Canyon National Park． About five million tourists visit the park each year．
（1） （2） （3） （4） （5）
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 from a village far away．It takes her six hours to get enough clean water for daily(日常的)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(表面)．But most of that is sea water．We can’t use it for 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(漏水的水龙头)waste a lot of water．Fix them right away！
● You can easily cut your 10-minute showers(沐浴)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！Every morning Napoga went to get clean water________．
| A．before she went to school |
| B．after she finished school |
| C．without going to school |
| D．after she played with her friends |
On the earth，________．
| A．sea water is widely 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 |
Acid rain________．
| A．is only bad for living things |
| B．can be produced in factories |
| C．doesn’t do harm to people，but it’s bad for plants，animals and buildings |
| D．doesn’t just do harm to human beings but also to animals，plants and buildings |
Which of the following wastes water？
| 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． |
What’s the main idea of the passage？
| 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． |
One day the famous American scientist Albert Einstein met an old friend of his on a street in New York．
“Mr.Einstein．”said the friend．“it seems that you need to put on a new overcoat．Look，how worn-out it is！”
“It doesn’t matter．”answered Albert Einstein．“No one knows me here in New York．”
Several years later they met in New York again．Einstein had been a world-famous physicist after then but he still wore the same old overcoat．
Once more his friend advised him to buy a new one．
“There is no need now，”said Einstein．“Everybody here has known me．”
根据短文内容，回答问题。Where did Albert Einstein meet an old friend of his？
_______________________________________________________________________________What did the friend want him to buy？
_______________________________________________________________________________How about Einstein’s overcoat？
_______________________________________________________________________________Did Einstein still wear the same old overcoat when he became a world-famous physicist？
_______________________________________________________________________________What did Einstein say when the friend advised once more him to buy a new overcoat？
_______________________________________________________________________________
Have you ever heard of a girl of 15，who set up a company of her own？Wendy Wong is the girl．She started the business two years ago．She has already written several successful computer games．They are so popular that over half a million games are sold every year．Now all of her family work in her business，and she is still at school．
She gets up early in the morning，and then she talks with her family about the business over breakfast．Every day she goes to school in her own car with a driver，for she is not old enough．
She enjoys her school，but some of the work is too easy for her to feel interested．She usually gets“A”grades in all her subjects，so the other students often ask her for help．
She finishes her homework in half an hour after her driver takes her home．After dinner，she goes to her office and goes on working on her computer，writing games until 2 a.m．She does not usually need so much sleep as other children．
根据短文内容，回答问题。When did Wendy Wong start the business？
_______________________________________________________________________________What has Wendy Wong already written successful？
_______________________________________________________________________________How does Wendy Wong go to school every day？
_______________________________________________________________________________How about her grades in all her subjects？
_______________________________________________________________________________How long can she finish her homework？
_______________________________________________________________________________
Not many years ago，some farmers were worried because hawks were taking many of their chickens．The farmers didn’t know what to do．Finally they went to the country officials and asked for help．
“Kill the hawks，”the officials said．“We will even pay for them．”So the farmers began to think of ways to kill the hawks．
The farmers killed many hawks．They no longer had to worry about their chickens．But they now had a new worry．Field mice were eating up a lot of the farmers’grain．
How did this happen？
Hawks eat not only chickens but also field mice．They eat more field mice than chickens．But the farmers didn’t know this．When they killed a lot of hawks，they changed the balance．
When people move into a new place，they often destroy many wild plants．Often these plants are food for the animals．If the animals can’t find enough plants to eat，they will starve or have to leave the place．
In one part of the USA，for example，the deer there like to eat a certain kind of wild roses．The mountain lions there eat the deer．The number of deer，mountain lions and wild roses doesn’t change much if people leave things as they are．
But people killed many mountain lions in order to protect the deer．Soon there were so many deer that they ate up all the wild roses．Then the deer began to eat the green leaves of young trees．These trees were important to the farmers．So the farmers thought of ways to protect their trees．Now the deer had nothing to eat，and many of them died．This was another lesson from nature．
To keep the balance of nature is important for us to rememher．
根据短文内容，判断正(T)误(F)。Finally the officials told the farmers to kill the hawks．（）
Field mice eat not only chickens but also the farmers’grain．（）
When the animals can’t find enough plants to eat in a place，they will starve or have to leave．（）
The number of animals changes much if people leave things as they are．（）
It is important for us to keep the balance of nature．（）
There are many wetlands(湿地)in China and some of them have become the world’s important wetlands．The Chinese Yellow Sea Wetlands are among them．They are in Yancheng，Jiangsu Province．They are home for many different kinds of birds and animals．The world’s largest Milu Deer Nature Reserve(自然保护区)is in them．More than 700 milu deer live freely there．There are not many red-crowned cranes in the world，but every winter you can see some in the Red-crowned Cranes Nature Reserve in the Yellow Sea Wetlands．
The temperature in the wetlands is usually neither too high nor too low．There is a lot of rain and sunshine，too．They are really good places for wildlife(野生生物)．Offering food and home for some special kinds of animals and birds is not the only reason why we need to protect wetlands．Wetlands are important because they also prevent flood．But some people want to change the wetlands to make more space for farms and buildings．This means there will be less and less space for wildlife．
Luckily，more and more people are beginning to realize the importance of wetlands and wildlife．Every year，on February 2nd，many activities are held to tell people more about wetlands．The Chinese Yellow Sea Wetlands are in the________of China．
| A．east |
| B．south |
| C．west |
| D．north |
Usually the weather in the wetlands is________．
| A．hot |
| B．pleasant |
| C．cold |
| D．dry |
The World Wetlands Day is on________．
| A．April 22 |
| B．June 25 |
| C．February 2nd |
| D．March 22 |
We must protect wetlands because________．
| A．they are home for wildlife |
| B．they can prevent flood |
| C．they can offer food to the animals and birds |
| D．all of the above |
The best title for the passage is________．
| A．China’s Wetlands Have All Entered the World’s List |
| B．Wetlands—Home for Wildlife and Human Beings |
| C．Special Animals in the Chinese Yellow Sea Wetlands |
| D．Wetlands—Valuable Recourses(珍贵资源)of Land on the Earth |