单项选择题

It's disturbing to note how many of crimes we do know about were detected ______, not by systematic inspections or other security procedures.

A．by accident
B．on schedule
C．in general
D．at intervals
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单项选择题
He wanted to stay at home, but at last he agreed, very ______ though, to go to the concert.
A．decisively
B．reluctantly
C．willingly
D．deliberately
单项选择题
You can always ______ Jim in a crisis, for he is simply the most helpful person I've ever known.
A．refer to
B．count on
C．cope with
D．run into
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