单项选择题

The boss stressed the criterion that a qualified waiter must do every service ______ the satisfaction of his customers.

A．for
B．by
C．on
D．to
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单项选择题
These areas rely on agriculture almost ______ , having few mineral resources and a minimum of industrial development.
A．respectively
B．undoubtedly
C．incredibly
D．exclusively
单项选择题
With the experience approaching the ,final success, everyone knows that they can not ______ a single minor mistake and ruin the whole thing.
A．inflict
B．endure
C．stand
D．afford
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