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
To their great surprise, they found the floodwater had damaged the building's foundation.
A．underlain
B．underlined
C．undertaken
D．undermined
单项选择题
It is said that science has become too complex to acknowledge the existence of universal truths.
A．address
B．declare
C．affirm
D．perceive
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