单项选择题

Some scholars have come ______ a new solution to the problem of population control.

A．up
B．up with
C．down
D．down with
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单项选择题
Our investigation ______ the inefficiency of your management.
A．showed out
B．showed through
C．showed off
D．showed up
单项选择题
______ my interest in formal semantics, this university is the best place to study.
A．Giving
B．Being given
C．To give
D．Given
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