NASA built the mars climate orbiter to get information about __________.

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• 1We can conclude from this passage that ballet _________.

  A.will continue to change

  B.is a dying art

  C.is currently performed only in Russia

  D.is often performed by dancers with little training

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• 2Who had an important influence on early ballet、

  A.Balanchine

  B.Louis XIV

  C.Antoinette

  D.Diaghilev

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• 3Professional ballet was first performed in _________.

  A.France

  B.Italy

  C.Russia

  D.America

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• 4The word "pageants" in paragraph 2 means_________.

  A.dances

  B.instruction

  C.royal courts

  D.big shows

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• 5This passage deals mainly with _________.

  A.famous names in ballet

  B.Russian ballet

  C.how ballet has developed

  D.why ballet is no longer popular

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• 6How long did it take the orbiter to get close to mars、

  A.One year.

  B.Less than one year.

  C.About two and a half year.

  D.More than three years.

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• 7When did the orbiter's problem begin、

  A.Right after it left for Mars.

  B.When it got near Mars.

  C.Right after it landed on Mars.

  D.When it returned to Earth.

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• 8What caused the orbiter's problem、

  A.Scientists used wrong guidelines of mathematics.

  B.Scientists used wrong building materials.

  C.Scientists used different operating systems.

  D.Scientists used different measurement systems.

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• 9Why didn't NASA scientists identify the problem before the orbiter left for Mars、

  A.They didn't know the English system.

  B.They were sure of the success of the trip.

  C.They didn't get enough research funding.

  D.They were tired from working long hours.

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• 10Whooping cranes migrate in winter to__________.

  A.find warmth and food

  B.raise baby whooping cranes

  C.get human help

  D.lay eggs

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