单项选择题

We are convinced ______ the righteousness of our cause.

A．of
B．on
C．over
D．at
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单项选择题
This ticket ______ you to a free meal in our new restaurant.
A．grants
B．entitles
C．credits
D．permits
单项选择题
______ the water left in the kettle, the doctor put several things he unwrapped from a handkerchief.
A．At
B．To
C．Within
D．Into
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