Question

Sometimes our opinions differ _________ what we choose to observe and how we deal with what we’ve observed

A. whichB. sinceC. becauseD. because of

Answer

D

【解析】

because 作为从属连词，主要用于引导原因状语从句，既然是引导一个从句，也就是说它的后面不能再连用“引导词”。句中的 what 相当于 the thing that，也就是说 what you said 相当于 the thing that you said。其中 the thing 用作 because of 的宾语，而that you said 为修饰 the thing 的定语从句。