Up to now, nothing ______ Betty. I want to know the reason ______ he hasn't writ ten to me.
A、
has heard from; that
B、
was heard from; that
C、
has been heard from; why
D、
heard from; why
【正确答案】
C
【答案解析】
up to now一般和现在完成时连用reason后面的定语从句一般用why引导。
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