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：副词辨析。A而且；B因此；C于此同时；D否则，要不然；结合句意可知C正确。句意：熟练工人的工资上涨了，同时不熟练的工人的工资下降了。