Who has won an award as an illustrator or a photographer、

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• 1What is special about North American Endangered Species、

  A.It uses examples from the child’s world.

  B.The author introduces animals with poems.

  C.It contains bright colors.

  D.It takes a close look at sea animals.

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• 2What do we learn from Big Blue Whale、

  A.The number of the blue whale is increasing.

  B.Many animals are in danger of dying out.

  C.There used to be more than 10,000 blue whales.

  D.The blue whale has strong survival abilities.

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• 3Which of the following could be the best title for the text、

  A.Sally Ride’s first space trip

  B.A national hero flying in space

  C.Sally Ride, a successful businesswoman

  D.Sally Ride, a real educator for kids

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• 4What can we infer from the text、

  A.Sally inspired many American women to travel to space.

  B.Sally made great contributions to American economic development.

  C.Women astronauts used to be looked down upon in American history.

  D.The government did not allow women to become astronauts in the past.

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• 5From the fifth paragraph, we know that Sally      .

  A.was good at doing business

  B.wanted to be rich by doing business

  C.became a famous writer at last

  D.had a lasting interest in space

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• 6A child who wants to learn about how whales communicate will buy    .

  A.Big Blue Whale

  B.Life in the Coral Reef

  C.North American Endangered Species

  D.Whale

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• 7What is the article mainly about、

  A.A new way to treat sleep disorders.

  B.The discovery of the sleep “homeostat”

  C.Advice on what to do when you fail to fall asleep.

  D.A comparison of the two mechanisms that regulate sleep.

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• 8How does the author explain the function of the sleep homeostat、

  A.Through examples.

  B.With comparisons.

  C.Through cause and effect analysis.

  D.By presenting research findings.

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• 9What can we conclude from the article、

  A.Generally, the sleep homeostat has less effect on people during the day than at night.

  B.There is little scientists can do to affect the way the sleep homeostat works.

  C.What makes us go to sleep at night is probably a combination of the two mechanisms.

  D.The more homeostat neurons there are in one’s brain, the more easily one can fall asleep.

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• 10The underlined word “unravel” in the last paragraph is closest in meaning to      .

  A.put up with

  B.figure out

  C.keep track of

  D.take notice of

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