单项选择题

A ______ is a formal or official agreement made between persons, groups, institutions or states.

A．contract
B．contact
C．contrast
D．contest
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单项选择题
They asked her to ______ the facts as she remembered them.
A．set up
B．set off
C．set aside
D．set down
单项选择题
I ______ you any more, because it's highly confidential.
A．dare not to tell
B．dare not tell
C．don't dare telled
D．dare not telling
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