The ines of skilled workers went up. ，unskilled workers saw their earnings fall.
A. Moreover
B. Therefore
C. Meanwhile
D. Otherwise
网友回答
A. Moreover
B. Therefore
(答案→)C. Meanwhile
D. Otherwise
解析：A. Moreover还有，B. Therefore 因此，C. Meanwhile同时，然而，D. Otherwise否则，句意：技术工人的收入在增加，然而，没有技术的工人收入在下降。选C。