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    【题目】Is very important that people protect plants and animals?

    A. they B. he C. there D. it

    【答案】D

    【解析】句意：人们保护植物和动物很重要吗？考查it句型。本句是“It’s+形容词+that从句”结构，that从句（还有不定式和动名词）是句子的真正主语，为了避免“头重脚轻”，用it做形式主语，把真正的主语放在后面。根据句意结构，可知选D。

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