单项选择题

The chances of discovering life on Neptune are about a million _________.

A．at one
B．for one
C．to one
D．against one
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单项选择题
He spoke English so well that I took it _________ that he was an American.
A．for granted
B．as true
C．for certain
D．as such
单项选择题
Don't _________ the camera _________ unless you are sure you can put it together.
A．take...off
B．work...out
C．set...off
D．take...apart
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