Passage OneQuestions 11 to 13 are based on the following passage:

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• 1Passage TwoQuestions 14 to 16 are based on the following passage:

  A.To estimate the extreme weather.

  B.To develop the satellite technology. 

  C.To improve agricultural output. 

  D.To learn how to change information to maps more efficiently. 

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• 2Passage ThreeQuestions 17 to 20 are based on the following passage:

  A.Call on people to protect sharks.

  B.Point out the living environment of sharks. 

  C.Explain why the sharks are dangerous. 

  D.An introduction to sharks. 

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• 3What is this passage mainly about、

  A.Demonstrating the serious weather condition around Lake Chad. 

  B.Introducing people's activity around Lake Chad.

  C.Analyzing of the factors that cause water decreases in Lake Cha

  D.D.Introducing scientists' work about water condition in Lake Chad.

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• 4What did people do to solve the problem of rain lack around Chad Lake、

  A.They moved out of this area.

  B.They drew water from Lake Chad.

  C.They carried water from other areas.

  D.They utilize seawater near this area.

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• 5Which of the following is true according to this passage、

  A.Chad Lake located in the middle of Chad in northern Africa.

  B.The water from Chad water can now only be used for irrigation.

  C.The area around Chad Lake has suffered from heavy rain lack many decades.

  D.Population around the Chad Lake now begins to decrease due to water lack.

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