is as much an art as it is science.A. Cloning; aB. Clone; / C. To clone; the D. Cloning

问题补充：

is as much an art as it is science.

A. Cloning; a

B. Clone; /

C. To clone; the

D. Cloning; the

答案：

(答案→)A. Cloning; a

B. Clone; /

C. To clone; the

D. Cloning; the

解析：

第一空考查动名词做主语，第二空填a表示泛指：一门科学，句意是：克隆即是艺术又是科学。选A。