The teacher told us that everyone has an important role in protecting the earth from.A. to

The teacher told us that everyone has an important role in protecting the earth from .
A. to play; to pollute
B. to be played; to be polluted
C. to play; being polluted
D. to be played; being polluted

A. to play; to polluteB. to be played; to be polluted(答案→)C. to play; being pollutedD. to be played; being polluted解析：考查不定式用法和动名词用法。当动作是句子主语所做的时候，使用主动语态表示。本题第一空：每个人都要起重要的作用。本句中的to paly正是句子主语everyone所做。故使用主动形式；第二空前的earth与pollute使用被动语态的形式。句意：老师告诉我们在保护地球不受污染方面，每个人都要起重要的作用。故C正确。

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