单项选择题

Mary is an active______ in social work. She spends much time staying with orphan children every summer.

A．patriot
B．pilgrim
C．participant
D．parasite
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单项选择题
The______ of the bank where he worked was not in the centre of the city.
A．branch
B．settlement
C．successor
D．mansion
单项选择题
I can appreciate the______ that prompts you to make this offer.
A．magnet
B．intellect
C．motion
D．motive
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