________ on ten years of observation and study, Professor Wang announced that

everyone dreams every night，whether they realize it or not.

A．Basing B．Based

C．Been based D．Having based

 

B

【解析】B　[考查過(guò)去分詞形式作狀語(yǔ)。句意：基于10年的觀察和研究，王教授聲稱(chēng)，每個(gè)人每晚都會(huì)做夢(mèng)，不管他們是否意識(shí)到了。]

 

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