单项选择题

He rescued the boy from drowning at the ______ of his own life.

A．cost
B．price
C．expense
D．charge
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单项选择题
He's not ______ to learn German in six months.
A．capable
B．can
C．enable
D．able
单项选择题
I knew the news, ______ I told you.
A．As
B．As though
C．As far as
D．As soon as
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