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

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• 1At 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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• 2According 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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• 3About the future of the arts of reading the author feels ________.

  A.upset

  B.uncertain

  C.alarmed

  D.pessimistic

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• 4The 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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• 5A major problem with most adolescents who can read is ________.

  A.their fondness of music and TV programs

  B.their ignorance of various forms of art and literature

  C.their lack of attentiveness and basic understanding

  D.their inability to focus on conflicting input

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• 6By saying “With Mars the scientific stakes are arguably higher than they have ever been” (Line 1, Par

  A.4), the author means that ________.A.with Mars the risks involved are much greater than any previous space ventures

  B.in the case of Mars, the rewards of scientific exploration can be very high

  C.in the case of Mars, much more research funds are needed than ever before

  D.with Mars, scientists argue, the fundamental interests of science are at issue

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• 7The 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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• 8If 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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• 9The ________ form childhood to adulthood is always critical time for everybody.

  A.conversion

  B.transition

  C.turnover

  D.transformation

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• 10It 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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