单项选择题

Sometimes the bank manager himself is asked to ______ checks ff his clerks are not sure about them.

A．credit
B．assure
C．certify
D．access
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Living in the western part of the country has its problems, ______ obtaining fresh water is not the least.
A．with which
B．for which
C．of which
D．which
单项选择题
There are many who believe that the use of force ______ political ends can never be justified.
A．in search of
B．in pursuit of
C．in view of
D．in light of
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