单项选择题


A．in
B．by
C．at
D．for
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单项选择题
A．refersB．appliesC．happensD．concerns
A．refers
B．applies
C．happens
D．concerns
单项选择题
A．possibilitiesB．opportunitiesC．capacitiesD．responsibilities
A．possibilities
B．opportunities
C．capacities
D．responsibilities
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