单项选择题

People seldom trust him since he usually fails to______his promises.

A．keep to
B．keep on
C．keep off
D．keep up
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单项选择题
However much he______his expenses, he cannot make both ends meet.
A．cuts down
B．cuts in
C．cuts out
D．cuts off
单项选择题
The bill is______at any time up to next Friday.
A．payable
B．commercial
C．luxurious
D．enormous
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