The underlined word “undoing” probably refers to the pigeons’ ______.

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• 1In the 18th and early 19th centuries, passenger pigeons _______.

  A.were the biggest bird in the world

  B.lived mainly in the south of America

  C.did great harm to the natural environment

  D.were the largest bird population in the US

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• 2What type of writing is this text、

  A.An exhibition guide.

  B.An art show review.

  C.An announcement.

  D.An official report.

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• 3When will the prize-giving ceremony be held、

  A.On February 8th.

  B.On March 10th.

  C.On April 21st.

  D.On March 15th.

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• 4Who can take part in the Curiosity Challenge、

  A.School students.

  B.Cambridge locals.

  C.CSF winners.

  D.MIT artists.

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• 5What kind of life does the speaker seem to like most、

  A.Busy.

  B.Colorful.

  C.Quiet.

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• 6What was the main reason for people to kill passenger pigeons、

  A.To seek pleasure.

  B.To save other birds.

  C.To make money.

  D.To protect crops.

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• 7What can we infer about the law passed in Michigan、

  A.It was ignored by the public.

  B.It was declared too late.

  C.B.It was declared too late.C.It was unfair.

  D.It was strict.

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• 8Why does the lion tamer use a chair、

  A.To show off his skills.

  B.To trick the lion.

  C.To get ready for a fight.

  D.To entertain the audienc

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• 9In what sense are people similar to a lion facing a chair、

  A.They feel puzzled over choices.

  B.They hold on to the wrong things.

  C.They find it hard to make change

  D.D.They have to do something for show.

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• 10What is the author’s attitude towards the experts mentioned in Paragraph 3、

  A.Tolerant.

  B.Doubtful.

  C.Respectful.

  D.Supportiv

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