By saying “With Mars the scientific stakes are arguably higher than they have ever been” (Line 1, Par

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• 1What is the main goal of sending human missions to Mars、

  A.To find out if life ever existed there.

  B.To see if humans could survive there.

  C.To prove the feasibility of large-scale space ventures.

  D.To show the leading role of science in space exploration.

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• 2At present, a probable inducement for countries to initiate large-scale space ventures is ________.

  A.international cooperation

  B.scientific research

  C.nationalistic reasons

  D.long-term pro fits

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• 3According to the passage, the chief purpose of explorers in going to unknown places in the past was ________.

  A.to display their country’s military might

  B.to accomplish some significant science

  C.to find new areas for colonization

  D.to pursue commercial and state interests

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• 4About the future of the arts of reading the author feels ________.

  A.upset

  B.uncertain

  C.alarmed

  D.pessimistic

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• 5The author claims that the best way a reader can show admiration for a piece of poetry or prose is ________.

  A.to be able to appreciate it and memorize it

  B.to analyze its essential features

  C.to think it over conscientiously

  D.to make a fair appraisal of its artistic value

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• 6The passage tells us that proof of life on Mars would ________.

  A.make clear the complex chemistry in the development of life

  B.confirm the suggestion that bacterial fossils traveled to Earth on a meteorite

  C.reveal the kind of conditions under which life originates

  D.provide an explanation why life is common in the universe

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• 7If you want this painkiller, you’ll have to ask the doctor for a ________.

  A.transaction

  B.permit

  C.settlement

  D.prescription

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• 8The ________ form childhood to adulthood is always critical time for everybody.

  A.conversion

  B.transition

  C.turnover

  D.transformation

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• 9It is hard to tell whether we are going to have a boom in the economy or a ________.

  A.concession

  B.recession

  C.submission

  D.transmission

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• 10His use of color, light and form quickly departed from the conventional style of his as ________ he developed own technique.

  A.descendants

  B.predecessors

  C.successors

  D.ancestors

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