What does the underlined word “it” in Paragraph 5 refer to、

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• 1Why can the Antarctic cod live at the freezing temperature、

  A.The seawater has a temperature of -1.88℃.

  B.It loves to live in the ice-salt mixture.

  C.A special protein keeps it from freezing.

  D.Its blood has a temperature lower than -2.05℃.

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• 2What is the text mainly about、

  A.The terrible conditions in the Antarctic.

  B.A special fish living in freezing waters.

  C.B.A special fish living in freezing waters.C.The ice shelf around Antarctica.

  D.Protection of the Antarctic cod.

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• 3What should parents do in raising a teenager according to the text、

  A.Not allow him to learn driving or take drugs.

  B.Give him advice only when necessary.

  C.Let him have his own telephone.

  D.Not talk about personal things with him.

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• 4The last paragraph is about how to teach a teenager ________.

  A.to use the phone in a proper way

  B.to pay for his own telephone

  C.to share the phone quickly

  D.to answer the phone quickly

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• 5What does the phrase “clam up” in Paragraph 2 probably mean、

  A.become excited

  B.show respect

  C.refuse to talk

  D.seek help

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• 6What does “glycol-” in the underlined word “glycoprotein” in the last paragraph mean、

  A.sugar

  B.ice

  C.blood

  D.molecule

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• 7Where did the author get off the train、

  A.Paris.

  B.Strasbourg.

  C.Nancy.

  D.Barn.

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• 8On which days did the tourists spend most of their time on the boat、

  A.Monday and Tuesday.

  B.Tuesday and Wednesday.

  C.Wednesday and Thursday.

  D.Monday and Wednesday.

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• 9From the text, we learn that Baccarat and Sorrenbourg are the names of ________.

  A.towns

  B.churches

  C.museums

  D.mountains

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• 10What does the author think of the tour、

  A.Tiring.

  B.Expensive.

  C.Enjoyable.

  D.Quick.

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