单项选择题

The director gave me his （）that he would double my pay if I did my job well.

A．warrant
B．obligation
C．assurance
D．certainty

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单项选择题
Their diplomatic principles completely laid bare their （）for world conquest.

A．admiration
B．ambition
C．administration
D．orientation
单项选择题
After several nuclear disasters, a （）has raged over the safety of nuclear energy.

A．quarrel
B．suspicion
C．verdict
D．controversy
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