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1 
2 
3 
1.Sign I means __________.
A.people must wear protective glasses in this area B.people mustn't wear protective glasses in this area
C.it's dangerous to wear a pair of glasses in this area D.this pair of glasses is dangerous for people's eyes
2.Sign 2 is mainly for __________.
A.students B.teachers C.policemen D.drivers
3.Sign 3 is probably put up __________.
A.on the gate of a park B.on the gate of a school
C.on the wall of a reading room D.on the wall of a post office
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Which sign means that you must wear a mask(口罩) ________.
A.
B.
C.
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—What does this sign mean, Miss Chen?
—Oh, it says that we ________take photos here.
A. needn’t B. may not C. mustn’t
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We must follow Sign ______ to save every drop of water.
A. 
B. 
C. 
D. 
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We _______ talk loudly when we see the sign “ Be quiet ”on the right.
A. must B. mustn’t C. need D. needn’t
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—Look at the sign!
—Oh, I see.We _______ waste water.
A. can B. must C. mustn’t D. needn’t
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When we see Sign ________, we know it is a place for people to make a phone call .
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The earth is our home；we must take Care of it. This means keeping the land，air and water clean.
Pollution is a dirty word. To pollute means to make things unfit(不合适的)or unclean to use. Pollution comes in many ways. We see it，smell it，taste it and drink it. Pollution is beginning to threaten(威胁)our health，or happiness and our life.
Man. has been polluting the earth from the time he first made fire，washed his clothes in the river and threw his waste on the ground. When land was used up or water became dirty. Men moved to another place. At first the problem was not so serious because there was plenty of clean air，land and water. There weren't so many people then and their wants(需求)were fewer. All the dirty things could be absorbed(吸收)by nature and soon. covered over(恢复)， But this is no longer true. The increase of population(人口增长)and the development of industry have changed that. Man is slowly polluting. his environment.
Through the use of poison(农药)，mall has polluted land! killing the animal. By putting dirty water and chemicals into rivers and lakes we have polluted our drinking water，killing the fish.
Our increasing population is part of the. problem. More people more waste.
Where is this all to end? Are we turning the world into a big rubbish dump，or is there any hope that we can get rid of(摆脱)the pollution ?Luckily，millions of people have been warned of the danger of pollution. Large numbers of people are now working hard to bring pollution under
1.Which sentence is WRONG?
A. We live on the earth，so we should look after it.
B. To pollute means to make air ，water and land unfit for use.
C. All the waste produced by modem industry can be absorbed.
D. Man is now fighting against different kinds of pollution.
2.In this passage the word "chemicals" means
A.化学 B.化学物质 C.化学的 D.医学的
3. From the sentences "More people more waste"，we know that _______.
A. because of the increase of population and the development of industry，more and more waste is produced
B. we need more people，not more waste
C. there isn't any hope that we can get rid of the pollution
D. more people have been warned of the danger of more waste.
4.From the passage we can know that now man_______.
A. doesn't know how to control pollution
B. still doesn't realize how serious pollution is
C. is doing something to control pollution
D. begins to understand the pollution
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We must never miss the chance to show love for our parents and make them how much they mean to us.
A. to know B. knowing
C. know D. known
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根据句意、中文提示写出单词，完成句子。每空一词。
1.We must understand that high__________ (分数) don’t always mean good abilities.
2.Mrs.Black is an organized housewife. Everything in her house is always in ________ (秩序).
3.He’ll help us with our lessons if we are ___________(缺席的) from school.
4.The Internet is so widely used now that we can’t ___________ (想象) what life will be like without the Internet.
5.Black represents power and (信任)。