单项选择题

A．They have great effect on people’s intelligence.
B．They have some effect on most people’s intelligence.
C．They have effect on some people’s intelligence.
D．They have no effect on people’s intelligence.
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将rock boat of a friendship改为rock the boat of a friendship。
单项选择题
A．A couple’s experience as volunteers.B．The need for volunteers in the Third World.C．A new public emphasis on volunteering.D．The rewards of volunteering.
A．A couple’s experience as volunteers.
B．The need for volunteers in the Third World.
C．A new public emphasis on volunteering.
D．The rewards of volunteering.
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