单项选择题

You should know better than ______ the risk of gambling.

A．to run
B．running
C．to have run
D．ran
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单项选择题
He is the most brilliant pianist ______ I have ever met.
A．which
B．that
C．who
D．whom
单项选择题
Our university has introduced sound personnel evaluating system with less emphasis on age ______.
A．than more on ability
B．and more on ability
C．and more ability
D．than ability
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