单项选择题

For those who have hearing problems telephones with volume controls provide the best ______.

A．result
B．reply
C．response
D．solution
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单项选择题
Dr.Johnson ______ the patient of the safety of the operations.
A．guaranteed
B．confirmed
C．assured
D．entrusted
单项选择题
They accept that what you are doing is ______ to their problems.
A．dependent
B．connecting
C．relevant
D．concerned
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