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Environment protection requires our joint effort. ______ will be achieved unless we work well together.

A．Nothing B．Anything C．Something D．Everything 

A

解析試題分析：句意：環(huán)境保護(hù)需要我們共同的努力。除非我們一起工作，否則沒有事情可以成功。Nothing沒有事情 Anything任何東西 Something某事 Everything每件事情，選A。
考點(diǎn)：考查代詞

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