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精英家教網 > 高中英語 > 題目詳情

Many people believe we are heading for environmental disaster _____ we basically change the way we live.

A. but    B. although    C. unless   D. once

 

C

考查狀語從句的連接詞。句意:許多人認為我們正走向環境災難除非我們從根本上改變我們的生活方式。

 

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