Does the writer think growing cities affect astronomers' work、 Why does he think so、

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• 1Which of the following statements is NOT related to light pollution、

  A.A haze of light is formed from artificial lights such as streetlights and building lights.

  B.Lights from different sources in the city stream into space and illuminate the night sky.

  C.The night sky is illuminated by the lights from big glowing cities in the night.

  D.Stargazing becomes difficult because there is a layer of haze in the air.

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• 2When can people see 14,000 stars、

  A.When they have a fairly good telescope.

  B.When they are in a large city.

  C.When the night sky is clear of clouds, moonlight and artificial lights.

  D.When the night sky is without haze and fog.

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• 3How does the author feel about the prospect of protecting endangered species from being extinct、

  A.Worried.

  B.Optimisti

  C.C.Indifferent.

  D.Confident.

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• 4According to the passage, which of the following is most important in saving declining species、

  A.Governments should make some laws to protect endangered species.

  B.People should pay more attention to the protection of natural surroundings.

  C.Relevant law must be made and enforced with the support of the people.

  D.Some organizations should warn people not to trade in endangered animals.

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• 5This passage mentions all of the following causes for the extinction of many species EXCEPT

  A.natural selection of species.

  B.various natural disasters.

  C.commercial trade and killing.

  D.destruction of natural surroundings.

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• 6How does light pollution affect wildlife.9 Which of the following is NOT correct、

  A.Animals may go off course due to the attraction of artificial lights.

  B.Animals might be attracted by artificial lights to go into cities.

  C.Artificial lights at night may make migrating birds lose their way.

  D.Attracted by artificial lights, birds fly into lighted buildings.

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• 7Which of the following is closest in meaning to the title "Light Night, Dark Stars" 、

  A.The night sky is light colored and stars are black.

  B.Lights appear at night and stars are seen in the dark.

  C.City lights illuminate the night sky and make stars invisible.

  D.City lights at night illuminate stars in the sky.

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• 8Backpacks are convenient because

  A.they can be very large.

  B.they can hold as many things as you want to carry.

  C.your hands are freed to do other things.

  D.you do not have to carry things with you.

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• 9What is the most important feature of the backpack invented by Lawrence C. Rome and his colleagues、

  A.It produces electricity for electronic devisees while the wearer walks.

  B.It can be used as cell phones, GPS in the military actions or field studies.

  C.It is small and convenient.

  D.It is light and easy to carry.

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• 10The word "springs" in Paragraph 3 means

  A.a small stream of water flowing naturally from the earth.

  B.the season of the year, occurring between winter and summer.

  C.the act or an instance of jumping or leaping.

  D.a length of metal wound around, which returns to its original shape after being pushed.

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