单项选择题

Radio is one of ______means of sending news and information.

A．the most common
B．the commonest
C．more common
D．common
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单项选择题
They took______ measures to prevent poisonous gases from escaping.
A．fruitful
B．beneficial
C．sufficient
D．effective
单项选择题
He gave her some beautiful roses ______her kindness.
A．in control of
B．in place of
C．in return for
D．in the name of
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