某同学做了以下两个实验：
（1）实验1中澄清石灰水的现象是___________________，
产生此现象的原因是__ _______ _____________ ___________；
（2）实验2中澄清石灰水的现象是_______________________，
产生此现象的原因是___ ________ ___________。
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!
When people communicate, they need words to express themselves. People living in different countries made different kinds of words.
Today there are about fifteen hundred languages in the world. Each contains many thousands of words. A very large dictionary, for example, contains four or five hundred thousand of words. But we do not need all these. To read short stories you need to know only about two thousand words. Before you leave school, you will learn only one thousand or more.
Vocabulary means a lot of words. The words you know are called your vocabulary. You should try to make your own vocabulary bigger. Read as many books as you can. There are a lot of books written in easy English for you to read. You will enjoy them. When you meet a new word, find it in your dictionary. Your dictionary is your most useful book.The number of different languages spoken is about _______.
| A．150 | B．15,000 | C．500 | D．1,500 |
Before you leave your school, you’ll learn _______.
| A．only two thousand words | B．five hundred thousand words |
| C．more than one thousand words | D．three or four thousand words |
To make your vocabulary bigger, you must _______.
| A．get as many dictionaries as you can |
| B．read as many books as you can |
| C．buy a lot of books |
| D．have a very large English dictionary |
You will enjoy_______.
| A．the books written in easy English |
| B．your dictionary |
| C．your new words |
| D．finding new words in a dictionary |
What is your most useful book?
| A．Books written in easy English. | B．Books written in English. |
| C．Your dictionary. | D．Short stories. |
A farmer had a cow. He took very good care of this cow and one day when it was ill, he was very worried. He telephoned the vet. “What’s the problem?” The vet asked him when he arrived. “My cow’s ill,” the farmer said. “I don’t know what’s the matter with her. She’s lying down and won’t eat. She’s making a strange noise.” The vet looked over the cow. “She’s certainly ill,” he said, “and she needs to take some very strong medicine.”
He took a bottle out of his box, put two pills into his hand and said, “Give her these. The pills should make her better.” “How should I give them to her?” the farmer asked.
The vet gave him a tube (管子)and said, “Put this tube in her mouth, then put the pills in the tube and blow. That’ll make it.”
The next day the vet came to the farm again. The farmer was sitting outside his house and looked more worried.
“How’s your cow?” the vet asked.
“No change,” the farmer said, “and I’m feeling very strange myself.”
“Oh?” the vet said, “Why?”
“I did what you said,” the farmer answered. “I put the tube in the cow’s mouth and then put two pills down it.”
“And?” the vet asked.
“The cow blew first,” the farmer said. In the story, the vet must be _________.
| A．the farmer’s friend | B．a milk factory |
| C．a hospital for cows | D．a doctor for animals |
The farmer asked the vet for help when his cow _______
| A．couldn’t lie down | B．didn’t eat the pills |
| C．couldn’t make any noise | D．was ill |
What medicine did the vet give the farmer?
| A．Bottle of pills. | B．A long tube. |
| C．Two pills. | D．A small box. |
The vet taught the farmer how _________.
| A．to blow the tube | B．to make the cow take the pills |
| C．to take the medicine | D．to put the tube in his mouth |
Which of the following is true?
| A．The farmer ate the pills himself. |
| B．The cow got better after taking the medicine. |
| C．The vet came to help farmer change the cow the next day. |
| D．The farmer waited for the vet outside his house the next day. |
Waste can be seen everywhere in the school. Some students ask for more food than they can eat and others often forget to turn off the lights when they leave the classroom. They say they can afford these things. But I don’t agree with them.
Waste can bring a lot of problems. Although China is rich in some resources（资源）, we are short of（缺乏） others, for example, fresh water（淡水）. It is reported that we will have no coal（煤） or oil to use in 100 years. So if we go on wasting our resources， what can we use in the future and where can we move？Think about it. I think we should say no to the students who waste things every day. Everybody should stop wasting as soon as possible.
In our everyday life，we can do many things to prevent waste from happening， for example， turn off the water taps（水龙头） when we finish washing， turn off the lights when we leave the classroom， try not to order more food than we need， and so on. Little by little， everything will be changed. Waste can be stopped one day， if we do our best.From the passage we know that some students often _______ in the school.
| A．eat too much | B．don’t work hard |
| C．waste things | D．throw rubbish everywhere |
Which is not mentioned in this passage？
| A．Fresh water | B．Forest. |
| C．Oil. | D．Coal. |
What may happen in 100 years？
| A．We may still have enough oil. | B．We may still have enough coal. |
| C．We may have a little oil. | D．We may have no coal or oil to use. |
Which of the following is right？
| A．Waste brings problems. | B．Waste can bring no problem. |
| C．China is rich in fresh water. | D．Students never waste things. |
Which is the best title of this passage？
| A．Stop Wasting | B．School life |
| C．Waste in the School | D．Rich Resources in China |
Did you feel it was warmer than before?
“There have been twenty-one winters in China since 1986,” said scientists. “ the past 100 years, as the world temperature has been up by 0.74 °C , the temperature in North China has 1.4 °C in only 50 years.”
China needs to take quick actions to carbon dioxide (二氧化碳) emission (排放) because it’s the main reason for world warming. The good news is that China has seen the importance of going China sets the goal of cutting energy use by 20% and pollution emission by 10% in the 11th Plan.
Here is some advice for you.
Wearing used clothes such as your brother’s, sister’s or dad’s old T-shirts means you energy; And don’t forget the lights when you leave a room and turn off your television and computer when they are not ! Besides, taking a bus saves a lot of oil every year. Also open a window and try not to use the air conditioner (空调). If necessary, set the temperature in summer and lower in winter to save energy; It isn’t good to use paper cups, bags or boxes in our daily life.
A．cool B．hot C．cold D．warm
A．during B．for C．since D．after
A．climbed B．went C．arrived D．got
A．increase B．improve C．cut D．break
A．yellow B．green C．black D．blue
A．Five-Year B．Five--Years C．five years D．five year
A．use B．find C．save D．keep
A．to turn on B．to turn off C．to turn up D．to turn over
A．in use B．on business C．at present D．for fun
A．stronger B．higher C．taller D．quicker
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