China’s oil price _____ very sharp increase during the year 2010 and it is continuing to rise further in 2011.

A．observedB．witnessedC．provedD．supplied

B

解析這題考查動詞的observe觀察witness目睹，見證prove證明supplied供應，句意是：2010中國見證了油價的急速上升，2011年還在持續(xù)上漲。選B。

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