单项选择题

The author of the book has shown his remarkably keen ______ into human nature.

A．intellect
B．insight
C．perception
D．understanding
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单项选择题
The more a nation's companies ______ factories abroad, the smaller that country's recorded exports will be.
A．lie
B．locate
C．spot
D．stand
单项选择题
We have arranged to go to the cinema on Friday, but we can be ______ and go another day.
A．probable
B．reliable
C．flexible
D．feasible
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