usually thought a kind of blanket __1__ the earth. But it is more than that. Maybe you have been in a cave deep in the earth. Did you think about the air that was in the cave? The land has some air mixed in it. Air is even mixed __2__ the water in the sea. These examples show that some air is __3__ the earth’s surface as well as above it.
Men once thought that there were four basic things from which everything else was made. They __4__ these things – earth, fire, air and water the four elements(元素). As men made more observations, they decided that fire was not an element. __5__ they concluded (得出结论) that land, air and water were not elements, either.
__6__, there are more than 100 elements from which scientists believe all things are made. __7__ land, air and water are not elements, they are three main parts of man’s environment. You will learn more about them as you study the earth. ( ) 1. A. above B. around C. across D. among ( ) 2. A. at B. in C. with D. to ( ) 3. A. below B. before C. between D. beside ( ) 4. A. told B. called C. name D. said ( ) 5. A. Usually B. Finally C. Hardly D. Nearly ( ) 6. A. Besides B. In addition C. Although D. In fact ( ) 7. A. When B. As C. Since D. Though
B) Read the passage and fill in the blanks with proper words（在短文的空格内填入适当的
词，使其内容通顺，每空格限填一词，首字母已给。）
Electricity is the flow of electrical power or charge. It is a secondary energy source which means that we get it from the conversion (转化) of other sources of energy, l__________ coal, natural gas, oil, nuclear power and other natural sources,
which are called primary sources. The energy sources we use to make electricity can be renewable or non-renewable, but electricity itself is neither renewable nor non-renewable.
Electricity is a basic part of nature and it is one of our most widely used forms of e__________. Many cities and towns were built along waterfalls that turned water wheels to work. Thomas Edison helped c__________ everyone’s life – he perfected his invention – the electric light bulb.
A__________ electricity is very important in our daily life, most of us hardly stop to think what life would be like w__________ electricity. Yet like air and water, we tend to take electricity for granted. Everyday, we use electricity to do many j__________ for us – from lighting and heating / cooling our homes, to powering our televisions and computers. Electricity is a useful and convenient form of energy used in the applications of light, heat and p________.
V. Writing
Write a passage of at least 60 words on the topic “Electricity in our daily life”. Suggested questions:
1. What’s the relationship between electricity and human beings? 2. What roles does electricity play in our life? 3. What should we do to use electricity in proper ways?
Electricity in our daily life
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Keys (参 考 答 案)
I. Choose the best answer (选择最恰当的答案，用A、B、C或D表示，填入空格内。)
1.B 2.B 3.C 4.B 5.C 6.D 7.A 8.C 9.D 10.A 11.B 12.D 13.C 14.A 15.A 16.D 17. C 18. B 19. D 20. D II.Complete the sentences with the given words box in their proper forms（用括号中所给单词的适当形式完成下列句子）
1. electricity 2. invisible 3. servant, dangerous 4. foolish 5. politely 6. monthly 7. difference 8. batteries 9. carefully 10. explanation III. Rewrite the sentences as required（按要求改写句子，每空格限填一词） 1. doesn’t have 2. How long 3. electricity comes 4. if / whether, will 5. to buy 6. ought to 7. could she 8. How funny
9. mustn’t go 10. don’t need / have IV. Cloze Text:
A) Choose the words or expressions and complete the passage（选择最恰当的单词或词语， 完成短文. ）
1. A 2. C 3. A 4. B 5. B 6. D 7. D
B) Read the passage and fill in the blanks with proper words（在短文的空格内填入适当的词，使其内容通顺，每空格限填一词，首字母已给） 1. like 2. energy 3. change 4. Although 5. without 6. jobs 7. power V. Writing
Electricity in our daily life
Electricity is very important in our daily life. We use different kinds of electrical appliances. They give us light and heat. They make our life more enjoyable and convenient. Electricity changes our life. Electricity is a good servant but it is also dangerous. If you do not use it properly, you may get an electric shock. So we should always remember to be careful with it. We should never play with it. We should save electricity whenever we can. We should make good use of electricity.