单项选择题

China is one of the few countries in the world that have devoted great efforts to________ world peace.

A．preserving
B．conserving
C．possessing
D．reserving
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单项选择题
The________on the bottle will tell you what is in it.
A．mark
B．stamp
C．label
D．paper
单项选择题
At the inauguration ceremony, the newly elected president________his speech with a few words of thanks to his supporters.
A．preceded
B．proceeded
C．precluded
D．advanced
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