单项选择题

He devoted most of his time ______ making scientific discoveries.

A．in
B．with
C．to
D．for
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单项选择题
A few days later, the policeman found the old man ______ in bed, dead.
A．lying
B．to lie
C．laying
D．lied
单项选择题
He took an umbrella with him in case it ______ .
A．would rain
B．should rain
C．rained
D．will rain
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