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I think that something has to be done to stop the air from being polluted, ______ ?
A．doesn't itB．don’t IC．don't theyD．haven't they
A

試題分析：考查反意問句：句意：我想為了阻止空氣被污染，要采取一些措施了。一般主句的主語(yǔ)是第一人稱反義疑問句用從句中的提問，陳述部分有has to +v. ，疑問部分常用doesn't +主語(yǔ)，選A。
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