单项选择题

Over the centuries man has developed drugs that could cure or ______ illness and suffering.

A．accelerate
B．comfort
C．aggravate
D．alleviate
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单项选择题
He ______ all his unfinished manuscripts to his colleagues in the laboratory before he went to France.
A．transferred
B．translated
C．transmitted
D．transacted
单项选择题
John is ______ to pollen.
A．alert
B．allergic
C．alien
D．analogous
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