单项选择题

It ______ the post office time if people address letters properly.

A．earns
B．wins
C．gains
D．saves
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单项选择题
The government had to ______ all his appointments for the day and rushed to the train accident.
A．set off
B．see off
C．call off
D．pay off
单项选择题
Mr. Smith's condition looks serious and it is doubtful if he will ______.
A．pull through
B．pull up
C．pull back
D．pull out
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