单项选择题

Tine director gave me his _________ that he would double my pay if I did my job well.

A．warrant
B．obligation
C．assurance
D．certainty
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单项选择题
The bed has been _________ in the family, it was my great-grandmother's originally.
A．handed our
B．handed over
C．handed down
D．handed round
单项选择题
That part of the city has long been _________ for its street violence.
A．notorious
B．responsible
C．historical
D．illegal
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