单项选择题

Many great scientists ______ their success to hard work.

A．portray
B．ascribe
C．impart
D．acknowledge
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单项选择题
The doctors don' t ______ that the patient will live much longer.
A．monitor
B．manifest
C．articulate
D．anticipate
单项选择题
The sign set up by the road ______ drivers to a sharp turn.
A．alerts
B．refreshes
C．pleads
D．diverts
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