【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(dòng)詞不定式一般式的被動(dòng)式作后置定語(yǔ)。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(dòng)物是多利羊。此處mammal和clone之間是一種被動(dòng)關(guān)系，是動(dòng)詞不定式一般式的被動(dòng)式作后置定語(yǔ)。故選A。

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