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A
Nearly all our food comes from the soil.Some of us eat meat，of course，but animals feed on plants.If there were no plants，we would have no animals or meat.So the soil is very necessary for life.The top of the ground is usually covered with grass or other plants.There may be dead leaves and plants on the grass.The waste matter from animals also falls on it.
All soil needs food.If we do not give it any，the plants will be weak.Animals’s waste is the best food for the soil，and chemical fertilizers(化肥)are also very useful.The same crop ought(应该)not to be grown in the same place every year.It’s better to grow one different crop.A change of crop and the use of a good fertilizer will keeo the land in good condition.
根据短文内容选择最佳答案。
( )1.The first paragraph tells us .
A.people should eat more meat B.soil should eat less meat
C.leaves are important for the soil D.people should grow more grass
( )2.Since plants are very important for life， is/are more important.
A.the waste matter from animals B.the chemical fertilizers
C.the animals D.the soil where the plants grow
( )3.It’s better to in the same place every year.
A.use different fertilizers B.have a different crop
C.keep the same grass D.grow the same plant
( )4.Which of the following is the best for soil?
A.Animals’ waste. B.Dead leaves and plants.
C.All kinds of grass D.Chemical fertilizers.
( )5.How do we make good use of the soil?
A.We use good fertilizers. B.We change the crops in the same place every year.
C.We must keep the land waste D.Both A and B.
www.170xue.comB
The world itself is becoming much smaller by using modern traffic and modern communication means.Life today is much easier than it was hundreds of years ago，but it has brough new problems.One of the biggest problems is pollution.To pollute means to make things dirty.Pollution comes in many ways.We see it，smell it，drink it and even hear it.
Man has polluted the earth.The more people，the more pollution.Many years ago，the problem was not so serious because there were not so many people.When the land was used up or the river was ditry in one place，man moved to another place.But this is no longer true.Man is now slowly polluting the whole world.
Air pollution is still the most serious one.It’s bad for all living things in the world，but it is not the only one kind of pollution.Water pollution kills fish and pollutes our drinking water.Noise pollution makes us angry more easily.
Many countries are making rules to fight pollution.They stop people from burning coal in houses and factories in the city，and from putting dirty smoke into the air.Pollution by SO2 is now the most dangerous kind of air pollution.It is caused by heavy traffic.We are sure that if there are fewer people driving，there will be less air pollution.
The earth is our home.We must take care of it.That means keeping the land，water and air clean.And we must take care of the rise in pollution at the same time.
根据短文内容选择最佳答案。
( )1. ，our world is becoming much smaller.
A.Thanks to science development
B.Because of the rise in pollution.
C.Because the earth is being polluted day and night
D.Because the earth is blown away by the wind every year
( )2.Hundreds of years ago，life was it is today.
A.as hard as B.as easy as C.much easier than D.much harder than
( )3.The underlined word “it” in the first paragraph means“ ”.
A.noise pollution B.water pollution C.air pollution D.rubbish
( )4.Why is air pollution the most serious kind of pollution?
A.Because it makes much noise.
B.Because it makes us angry more easily.
C.Because it makes our river and lakes dirty.
D.Because it’s bad for all living things in the world.
( )5.Which of the following is not true?
A.Many countries are making rules to fight pollution.
B.The pollution of the earth grows as fast as the world population does.
C.The problem of pollution is not so serious because there are not so many people living on the earth.
D.If people could go to work by bus or bike instead of car or motorike，it would be helpful in fighting against the problem of SO2.
www.170xue.com参考答案
一、1.create 2.weak 3.waste 4.breathe 5.deaf
二、1.disturb 2.Rubbish 3.influenced 4.industry 5.producing
三、1.C 2.B 3.C 4.D 5.D
四、1.D 2.A 3.D 4.C 5.B
6.A 7.C 8.C 9.B 10.C
11.D 12.B 13.B 14.B 15.C
五、1.What’s wrong/the matter with you
2.Have you seen a doctor
3.How long have you been like this
4.Why don’t you stay at home today
5.I can help you with you lessons
六、1.D 2.B 3.A 4.C 5.A 6.C 7.B 8.B 9.D 10.C
七、A.1.C 2.D 3.B 4.A 5.D
B.1.A 2.D 3.A 4.D 5.C
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