◎ 题干
Never before in China _______ for the unemployed.
A.has done so much
B.has been done so much
C.so much has been done 
D.has so much been done
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“Never before in China _______ for the unemployed.A.has done so muchB.has been done so muchC.so much has been doneD.has so much been done…”主要考查了你对  【全部倒装】【部分倒装】【省略句】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。