Cloning plants is straightforward while cloning animals is more plicated.
A. very
B. far
C. fairly
D. quite
网友回答
A. very
(答案→)B. far
C. fairly
D. quite
解析：考查副词：句意：克隆植物是直接的然而克隆动物要复杂的多。A. very非常，B. far很，非常，C. fairly相当，D. quite很，相当，只有far后面可以接形容词副词比较级，选B。