—More and more people think ________ necessary to let the students teach themselves．

—That's true．They can improve themselves in this way．


  1. A.
    it has
  2. B.
    it
  3. C.
    that
  4. D.
    it does
B
從題中可以看出，句子缺少賓語，而后面有動(dòng)詞不定式，它應(yīng)該是真正的賓語，前面要用一個(gè)形式賓語，只有it才能作形式賓語，所以選B。
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科目：初中英語 來源：2013-2014學(xué)年江蘇省蘇州市常熟市九年級(jí)上學(xué)期期末考試英語試卷（解析版） 題型：閱讀理解

The Internet, mobile phones and iPads are parts of our lives now. Technology is greatly affecting all ways of our lives, from the ways we work to the ways we play. And it even causes a number of social problems such as cloning (克隆) humans.

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    Hercules is a kind of underwater robot with some high technology equipments. It will be used to search for ancient ships which were destroyed into the deep sea during their journey long ago.

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C. To help solve the problems that technology causes.

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