单项选择题

I couldn't finish my paper because the computer ______.

A．took down
B．broke down
C．tore down
D．fell down
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单项选择题
No matter how little money we have, we should get into the habit of ______ some in the bank regularly.
A．laying
B．withdrawing
C．putting
D．depositing
单项选择题
It is common knowledge that soldiers have to endure the ______ during a war.
A．relaxation
B．reliability
C．reluctance
D．inconvenience
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