单项选择题

A bridge was built ______ the river.

A．on
B．at
C．over
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单项选择题
--I think he is in Class 5. -- Yes, that's ______.
A．OK
B．wrong
C．right
单项选择题
Well ______ , congratulations ______ you, Lingling!
A．done, to
B．did, to
C．done, for
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