单项选择题

You should be able to ______ right from wrong.

A．perceive
B．distinguish
C．sight
D．observe
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单项选择题
No one can be sure if the car on display fits him or her until he or she ______ them.
A．tries
B．will try
C．are trying
D．have tried
单项选择题
The committee is expected to ______ a decision this evening.
A．reach
B．arrive
C．bring
D．take
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