单项选择题

A．keeping the peace
B．helping in the fight against cancer and AIDS
C．helping with elections in many countries
D．bringing relief to victims of disasters
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单项选择题
A．a vote of competenceB．a veto of competenceC．a veto of confidenceD．a vote of confidence
A．a vote of competence
B．a veto of competence
C．a veto of confidence
D．a vote of confidence
单项选择题
A．to stop a possible comet-Earth collisionB．to knock a chunk out of the comet and see what lies underneathC．to test a newly developed missileD．to destroy the comet
A．to stop a possible comet-Earth collision
B．to knock a chunk out of the comet and see what lies underneath
C．to test a newly developed missile
D．to destroy the comet
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