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

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• 1The main purpose of the text is to tell parents_____.

  A.how to get along with a teenager

  B.how to respect a teenager

  C.how to understand a teenager

  D.how to help a teenager grow up

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• 2The text suggests that in the future we_____.

  A.may have to fight against more new diseases

  B.may easily get infected by diseases from dogs

  C.should not be allowed to have pets

  D.should stop buying pests from Africa

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• 3What does she phrase “the wake-up call” in paragraph 3 most probably mean、

  A.a new disease

  B.a clear warning

  C.a dangerous animal

  D.a morning call

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• 4Why did Isaksen advise people not to have foreign pets、

  A.They attack human beings

  B.We need to study native animals

  C.They can’t live out of the rain forest

  D.We do not know much about them yet

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• 5We learn from Paragraph I that the per sold at the shop may_____

  A.come from Columbia

  B.prevent us from being infected

  C.enjoy being with children

  D.suffer from monkey-pox

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• 6What 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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