题目内容

In most situations, light helps us see.But nowadays humans are using too much of it so that it is in fact a kind of pollution.

When it comes to looking at the night sky, too much light makes it difficult for us to watch some of life’s most wonderful sights: stars, planets and even galaxies(星系).

According to scientific research, about 2, 500 stars can be seen by the human eye without using any special equipment(设备).But because of light pollution, you can only see 200 to 300 stars from today’s countryside, and no more than ten stars from a city.In most big cities, people cannot see the sky filled with stars like they did in their childhood.

Light pollution affects more than just our view of sky.Research shows that lots of nighttime light can harm wildlife, too.

When birds fly to another place over cities, they sometimes get lost by the brightness and fly in circles(圈) until they drop from tiredness.Sea turtles(海龟) need dark beaches for laying eggs, but they can’t find their ideal places because of those bright lights.

Too much light at night may even affect human health, but scientists are not sure of that. They are still learning more.

In order to prevent things from going worse, governments and some organizations are working to reduce light pollution.Many cities and towns have taken action to reduce the use of lights at night.Lights are used only when and where they are truly needed.They also shine lights down at the ground instead of up into the sky and use lower brightness levels.

Hopefully, in the near future, humans can enjoy the clear and beautiful sky again and all the wildlife will live a peaceful and undisturbed life, too.

1.Why does the writer think that too much light is a kind of pollution?

A. Because there are fewer and fewer stars.

B. Because human health has been affected.

C. Because too much light is a waste of energy.

D. Because some of the wildlife can be harmed.

2.Which of the following is NOT mentioned(提到)in this passage?

A. The problems that light pollution has caused.

B. The reason why humans use too much light.

C. The ways that light pollution can be reduced.

D. The reason why fewer stars can be seen than before.

3.Which of the following is true according to the passage?

A. There are about 2,500 stars in the sky.

B. Humans want to do nothing to reduce light pollution.

C. Sea turtles always get lost and die from tiredness.

D. Something has been done to reduce light pollution.

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完形填空:通读下面短文,掌握其大意,然后从文章后各题所给的四个选项中选择一个最佳答案,并将其标号填入后面括号中.

    Have you  1    seen snow?  2    people in the world have not. A lot of countries  3    have snow-or they have it only on the tops of very high mountains. In Scotland and in the north of England, there is quite a lot of snow every  4    , but in the south of England, there is usually  5    .

    When a student from  6    country like Malaya (马来半岛)or Indonesia (印度尼西亚)comes to Britian in autumn for the first time, he feels  7    at first. There are  8    dark clouds, grey sky and cold rain in Britian in autumn, and most students from warm countries  9    like this.

    But snow is different. Although it is very cold, it is very  10    . Perhaps, after several dark mornings, the student wakes up one day, and there is a lot of  11    in his room. He thinks, Is it so  12    ? and jumps out of bed .But no,it si not very late. He  13    out of the window-and there is the  14    , on the ground and on the roofs (屋顶)of the houses and  15    . The light in his room came from that clean, beautiful white snow.

                                                                                                                                                                                                                                

1Aoften

Bever

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2    A A lot of

B Much

C A great deal of

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3Aever

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Doften

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4Aspring

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Dwinter

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5Aalittle

Blittle

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Dafew

[  ]

6. A. a cold

B a windy

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D a rainy

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7Ahot

Bcold

Ccool

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[  ]

8Aoften

Bnot

Cno

Deven

[  ]

9Anot

Bdoes not

Cdo not

Dhave

[  ]

10Abad

Bbeautiful

Cdirty

Dhandsome

[  ]

11Alight

Bdark

Cwind

Dbright

[  ]

12Aearly

Bcold

Cwarm

D.late

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13.A. sees

B. looks

C. looks at

D. sees for

[  ]

14.A.wind

B.rain

C.snow

D.fog

[  ]

15.A.anywhere

B.where

C.there

D.everywhere

[  ]

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