单项选择题

The negotiations which ______ the signing of the treaty took place over a number of years.

A．preceded
B．prescribed
C．proceeded
D．processed
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单项选择题
The Untied States and Canada are lands of ______ except for the Indians, who are the only true natives.
A．emigrants
B．immigrants
C．dwellers
D．inhabitants
单项选择题
Cooked vegetables are also valuable sources of certain vitamins and minerals, if the juice is eaten and if not cooked ______ .
A．too long a time
B．a long time too
C．much time long
D．long much time
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