Scientists still wonder cloning will help or harm us and it is leading us.
A. that; what
B. whether; where
C. if; that
D. whether; how
网友回答
A. that; what
(答案→)B. whether; where
C. if; that
D. whether; how
解析：wonder带两个宾语从句第一个从句不缺成分需一个起连接作用的词，第二从句缺少状语。 科学家想知道克隆对我们有害还是有助并且它要把我们带向何方。选B