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【题目】It was officially reported that the first mammal ______ successfully from an adult cell was Dolly the sheep.

A. to be cloned B. having been cloned

C. to clone D. to have been cloned

【答案】A

【解析】

考查动词不定式一般式的被动式作后置定语。句意:据官方报道,第一只成功从成年细胞克隆的哺乳动物是多利羊。此处mammalclone之间是一种被动关系,是动词不定式一般式的被动式作后置定语。故选A

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