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

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

【答案】D

【解析】句意：人們保護(hù)植物和動物很重要嗎？考查it句型。本句是“It’s+形容詞+that從句”結(jié)構(gòu)，that從句（還有不定式和動名詞）是句子的真正主語，為了避免“頭重腳輕”，用it做形式主語，把真正的主語放在后面。根據(jù)句意結(jié)構(gòu)，可知選D。

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