单项选择题

He has a clear ______of what needs to be done.

A．knowing
B．learning
C．understanding
D．meaning
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单项选择题
She told her children that they must not, ______, play with matches.
A．on any account
B．to good account
C．in no sense
D．by no means
单项选择题
He speaks English ______ better than I.
A．very
B．so
C．too
D．much
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