【题目】Cloning humans has been _____ in the science world for many years and it is likely to continue .
A. ridiculous B. contemporary
C. controversial D. contradictory
在线课程【答案】C
【解析】
试题分析：考查形容词。形容词ridiculous荒谬的；contemporary当代的现代的；controversial有争议的；contradictory矛盾的；句意：多年以来克隆人在科学领域都是有争议的，很可能会继续下去。根据句意可知C正确。