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托福阅读指代题范例(10)

2015-07-31 16:45:13来源:网络

  【托福阅读指代题范例(10)】托福阅读指代题实质是考察单词间指代关系的能力。新东方在线托福网为大家带来托福阅读指代题范例(10),希望对大家托福备考有所帮助。更多精彩尽请关注新东方在线托福网!

  查看全部:托福阅读指代题范例

  托福阅读指代题例题

  ② 非谓语动词作状语

  例题10:

  Paragraph 6: Under very cold conditions, rocks can be shattered by ice and frost. Glaciers may form in permanently cold areas, and these slowly moving masses of ice cut out valleys, carrying with them huge quantities of eroded rock debris. In dry areas the wind is the principal agent of erosion. It carries fine particles of sand, which bombard exposed rock surfaces, thereby wearing them into yet more sand. Even living things contribute to the formation of landscapes. Tree roots force their way into cracks in rocks and, in so doing, speed their splitting. In contrast, the roots of grasses and other small plants may help to hold loose soil fragments together, thereby helping to prevent erosion by the wind.

  The word them in the passage refers to

  Cold areas

  Masses of ice

  Valleys

  Rock debris

  答案见下一页>>>>


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