题目内容

Scientists still wonder ______ cloning will help or harm us and _____ it is leading us.
A．that; whatB．whether; where
C．if; thatD．whether; how
B
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
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