单项选择题

Not until last night ______ the news.

A．did I know
B．didn't I know
C．that I knew
D．had I known
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单项选择题
It ______ for four days and it hasn't stopped.
A．is raining
B．has been raining
C．has rained
D．had rained
单项选择题
My father can't operate a computer.______.
A．Nor can't my mother
B．So can't my mother
C．Neither can my mother
D．Nor my mother can either
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