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Measures must be taken to prevent pollution ________ happily.

A．from we live B．for us to live  C．us living  D．from our living 

B

解析試題分析：考查句意：對(duì)于我們來說，為了幸福地生活著，我們必須采取一些措施阻止污染。for us對(duì)于我們來說，to live不定式表示目的，本題中注意采取措施做某事的句型take measures to do sth,而prevent sb from doing sth阻止某人做某事，不符合題意，而只能用不定式作為目的狀語才符合題意，不定式的邏輯主語是us。故選B
考點(diǎn)：考查不定式做目的狀語

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