单项选择题

______ a lot of money made the study abroad possible for him.

A．Tom saved
B．Tom has saved
C．Tom's having been saved
D．Tom's having saved
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单项选择题
Every large city has its shifting population of vagrants. But in most ______, these are poor men.
A．conditions
B．cases
C．situations
D．circumstances
单项选择题
There is no rush now, for the game has been ______.
A．taken off
B．made out
C．called off
D．switched
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