单项选择题

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

A．innovated
B．imposed
C．implemented
D．inflicted
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单项选择题
We have made a(n) _________ order for the new product since we are not sure whether tho.local consumers will accept it.
A．ritual
B．tentative
C．inadequate
D．serial
单项选择题
There have been different _________ in the media about the cause of the prince's death.
A．appendix
B．versions
C．clues
D．categories
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