单项选择题

Despite all the policeman's questions the lady continued to ______ that she was innocent.

A．affirm
B．ascertain
C．confirm
D．certify
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单项选择题
The grounds of the presidential palace are ______ by soldiers with guard dogs 24 hours a day.
A．surveyed
B．patrolled
C．investigated
D．inspected
单项选择题
As a good photographer, you must develop an awareness of the world around you and the people who ______ it.
A．innovate
B．inhabit
C．inhibit
D．inherit
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