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
网友回答
A. has done so much
B. 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”。