The past two years ________ a sharp rise...

The past two years ________ a sharp rise in oil price, which adds to the burden of auto transportation industry.

A．witnessed

B．has witnessed

C．is witnessing

D．witnesses

B 【解析】考查时态题。根据the past two years可知应该用现在完成时。本句是无生命的东西作主语，此处的the past two years作主语。witness 解释为：见证了。

考点分析：

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