Since production has risen , the personal ine has increased year by year.
A. steadily
B. fortunately
C. particularly
D. variety
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(答案→)A. steadily
B. fortunately
C. particularly
D. variety
解析：考查副词辨析。A稳定地；B幸运地；C专门地；D不同种类。句意：因为产量在稳定上升，人们的收入在逐年增加。根据句意所以选A。