Never before in China for the unemployed.A. has done so muchB. has been done so muchC.

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

A. has done so muchB. has been done so muchC. so much has been done　(答案→)D. has so much been done解析：本句是否定副词never开头，用部分倒装。句意为“中国以前从未为失业人员做过这么多”。

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