单项选择题

It was not until the accident happened

A．that I realized my carelessness
B．when I realized my carelessness
C．as I realized my carelessness
D．when my carelessness has been realized
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单项选择题
Weather ______, we'll have an outing tomorrow.
A．permits
B．permitted
C．permitting
D．permit
单项选择题
This invention is so great. ______.

A．So is it
B．So it is
C．Nor is mine
D．Nor is it
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