【題目】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】

考查動詞不定式一般式的被動式作后置定語。句意：據(jù)官方報(bào)道，第一只成功從成年細(xì)胞克隆的哺乳動物是多利羊。此處mammal和clone之間是一種被動關(guān)系，是動詞不定式一般式的被動式作后置定語。故選A。

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