单项选择题

You can never ______ that fellow for help at a critical moment.

A．take on
B．hold on
C．count on
D．hang on
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单项选择题
There is no one here who can ______ the problem.
A．see off
B．treat
C．deal with
D．set up
单项选择题
Water, when boiled, always ______ steam.
A．gives out
B．gives up
C．gives off
D．gives away
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