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—Heavy smog (雾霾 )in eastern and central China seems to get more and more serious.
—I agree. Something          to deal with it.
A.has doneB.is doingC.must be doneD.must do
C

试题分析:句意:在中国中东部的雾霾似乎变得越来越严重了。——我也这么想。必须采取措施来解决这个问题。结合语境可知下文主语为动作对象,故用被动语态,选C。
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