Scientists pay special attention to the study of plants because _______.

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• 1We can learn from the study published on the Nature website that ______.

  A.plants’ flowering is 8.5 times faster than leafing

  B.there are 1,634 plant species on the four continents

  C.scientists should improve the design of the experiments

  D.the experiments failed to predict how plants react to climate change

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• 2What is the key information the author wants to give in Paragraph 1、

  A.Plants’ reaction to weather could have damaging effects on ecosystem.

  B.The increasing speed of flowering is beyond scientists’ expectation.

  C.Climate change leads to the change of food production patterns.

  D.Food chains have been seriously damaged because of weather.

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• 3What can be said about MITx according to the text、

  A.It is first offered as part of the edX learning program.

  B.It is another free MIT-Harvard online learning program.

  C.It is a standard to recognize online learners’ achievement.

  D.It is a new kind of free online course of Harvard and MIT.

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• 4The underlined part in the text probably means “        ”.

  A.Get ready for the difficulties

  B.Get ready for this educational change

  C.Get prepared to complete the online courses

  D.Get prepared to make materials for the edX courses

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• 5What is said about online education in the text、

  A.Universities have been trying online courses.

  B.About 2,000 online courses have been offered.

  C.Over 100 million people have finished courses online.

  D.C.Over 100 million people have finished courses onlin

  E.D.Stanford and Yale together have courses similar to edX.

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• 6What can be inferred from the last two paragraphs about the world’s temperature、

  A.It has risen nearly 0.2℃ since 1979.

  B.Its change will lead to weather extremes.

  C.It is 0.8℃ higher in 1979 than that of 1990.

  D.It needs to be controlled within 2℃ in this century.

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