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
The opening between the rocks was very narrow, but the boys managed to ______ through.
A. press
B. squeeze
C. stretch
D. leap
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
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