单项选择题

He saved the drowning child ______ the cost of his own life.

A．on
B．at
C．for
D．with
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单项选择题
Car output for exportation is ______ than last year.
A．10 percent high
B．10 percent higher
C．10 percent highest
D．higher 10 percent
单项选择题
The new general manager is trying to find ______ to the company's financial problem.
A．a reaction
B．a reply
C．a solution
D．an answer
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