单项选择题

The principal duty of the United Nations is to safeguard the peace of the world.

A．primary
B．prime
C．privileged
D．precedent
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单项选择题
What he expressed as a mere supposition was taken by others as a positive statement.
A．suspect
B．surmise
C．suspicion
D．surrender
单项选择题
His major task is to integrate the work of various bureaus under the ministry.
A．organize
B．correspond
C．coordinate
D．respond
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