2. 外语
  3. People have proved______to be true that the heat we get from coal and oil comes from the sun.

People have proved______to be true that the heat we get from coal and oil comes from the sun.

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问题 People have proved______to be true that the heat we get from coal and oil comes from the sun.
选项 A、that
B、it
C、this
D、/
答案B
解析 考查it的用法。it是形式宾语，that从句是真正的宾语。
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专业英语四级

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