单项选择题

The best solution to the problem can only be found by a process of trail and ______.

A．mistake
B．error
C．success
D．experiment
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单项选择题
You are very selfish. It's high time you ______ that you are not the most important person in the world, Edgar said to his boss angrily.
A．realize
B．have realized
C．realized
D．should realize
单项选择题
It isn't so much his wife's appearance Peter likes ______ her property.
A．in
B．for
C．as
D．than
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