单项选择题

Because there is evidence of severely harmful effects from chemical dumps, the government has ______tougher cleanup measures.

A．imposed
B．impulsed
C．implemented
D．incorporated
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单项选择题
He is now in London, but he missed his parents,______ enjoy the exciting life there.
A．so much as to
B．very much to
C．so much to
D．too much to
单项选择题
Primitive monetary systems require the same balance of supply and demand that ______the U.S. Treasury and the Federal Reserve System.
A．confirms
B．confronts
C．conducts
D．confesses
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