单项选择题

The doctor’s efforts were______. The patient refused to accept the treatment.

A．of no avail
B．in no avail
C．by no avail
D．on no avail
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单项选择题
The wife of Steve Carvey, the baseball star, ______about being left alone too often.
A．bitterly has complained
B．has bitterly complaining
C．has been complained bitterly
D．has been complaining bitterly
单项选择题
To rid the world______, many people believe that we must______some fundamental changes in the way many of us live.
A．to pollution: have
B．with pollution: take
C．of pollution: make
D．in pollution: bring
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