单项选择题

The patient's intelligence has been ______ by a brain injury.

A．spoiled
B．marred
C．impaired
D．undermined
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单项选择题
With his poor English, he even cannot get his ideas across, ______ exert any essential effect on others.
A．let alone
B．that's to say
C．not to speak
D．not to say
单项选择题
The chairman ______ all the suggestions put forward into a single plan of action when the tragedy took place.
A．just have condensed
B．just condensed
C．had just condensed
D．were to condense
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