单项选择题

After the company______ the problem of unfair competition, its sales figures dropped to a record low.

A．look into
B．ran into
C．come into
D．put into
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单项选择题
His written English was first-class, and he had a(n)______ vocabulary for a sophomore.
A．intimate
B．initial
C．inevitable
D．incredible
单项选择题
Technical schools prepare their students for the application of practical skills they learn in class______ their work.
A．to
B．in
C．for
D．of
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