单项选择题

Nobody yet knows how long and how seriously the shakiness in the financial system will ______ down the economy.

A．put
B．settle
C．drag
D．knock
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单项选择题
My students found the book ______; it provided them with an abundance of in- formation on the subject.
A．enlightening
B．confusing
C．distracting
D．amusing
单项选择题
They are a firm of good repute and have large financial ______.
A．reserves
B．savings
C．storages
D．resources
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