单项选择题

The doctor took X-rays to （） the chance of broken bones．

A．make sure
B．rule out
C．break down
D．knock out

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单项选择题
He has behaved in the most extraordinary way recendy; I can’t （） his behaving like that at all．

A．look into
B．break through
C．account for
D．get over
单项选择题
The managing director took the ______ for the accident, although it was not really his fault.
A. guilt
B. blame
C. charge
D. accusation
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