China’s oil price very sharp increase during the year and it is continuing to rise f

问题补充：

China’s oil price very sharp increase during the year and it is continuing to rise further in .

A. observed

B. witnessed

C. proved

D. supplied

答案：

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：中国见证了油价的急速上升，还在持续上涨。选B。