单项选择题

A．United Nations Children’s Fund
B．The World Health Organization
C．International Science Institute
D．International Children’s Foundation
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单项选择题
A．0.3B．0.5C．0.6D．0.8
A．0.3
B．0.5
C．0.6
D．0.8
单项选择题
A．world travelB．educationC．knowledge of the worldD．service
A．world travel
B．education
C．knowledge of the world
D．service
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