So far this year we a rapid rise in food prices by between 10 and 20 percent．
A. experience
B. had experienced
C. experienced
D. have experienced
网友回答
A. experience
B. had experienced
C. experienced
(答案→)D. have experienced
解析：考查时态。根据句中时间状语so far到目前为止，故用现在完成时，选D。