China’s oil price very sharp increase during the year 2010 and it is continuing to rise further in 2011.
A. observed
B. witnessed
C. proved
D. supplied
网友回答
A. observed
(答案→)B. witnessed
C. proved
D. supplied
解析：
这题考查动词的observe观察witness目睹，见证prove证明supplied供应，句意是：2010中国见证了油价的急速上升，2011年还在持续上涨。选B。