He has changed a lot: ______in the past he was extremely self-centered, now he has real concern for others.
A、
When
B、
However
C、
As
D、
Whereas
【正确答案】
D
【答案解析】
解析：这是一道语法题，考点是关系副词的意思和用法。whereas引导的是让步状语从句，意思是：尽管…。
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