Question

________ is as much an art as it is ________ science.

A．Cloning; a

B．Clone; /

C．To clone; the

D．Cloning; the

Answer 1

A

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。