单项选择题

In 1986 the country initiated restrictions on the use of pesticides.

A．instituted
B．constituted
C．prosecuted
D．distributed
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单项选择题
The guest turned upside down his glass as a signal that he would drink no more.
A．conversed
B．inversed
C．traversed
D．reversed
单项选择题
Peter was seen crying when he came out of the office. We can deduce that he must have been punished.
A．confer
B．refer
C．prefer
D．infer
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