The past two years _______ a sharp rise in oil price，which adds to the burden of auto transportation industry.
A．witnessedB．witnessesC．is witnessingD．has witnessed
D

試題分析：考查時(shí)態(tài)：句意：在過去的兩年里我們目睹了油價(jià)的急劇上升，這增加了汽車運(yùn)輸業(yè)的負(fù)擔(dān)。the past two years 是表示過去的兩年中，是現(xiàn)在完成時(shí)的時(shí)間，此處是過去兩年油價(jià)的上升對(duì)現(xiàn)在造成影響，故用現(xiàn)在完成時(shí)。選D，
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