单项选择题

When he was set free after twenty years in prison, he was amazed ______the changed world he found.

A．at
B．of
C．on
D．to
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单项选择题
She is very careful. She______ very few mistakes in her work.
A．does
B．takes
C．makes
D．gets
单项选择题
They discussed the problem three or four times, but could come to no______.
A．end
B．conclusion
C．result
D．judgment
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