问题
选择题
246. Nelson Mandela played and is still playing a leading ________ in ending apartheid(种族隔离政策) in South Africa.
A．use
B．roles
C．role
D．Parts
答案
C
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246. Nelson Mandela played and is still playing a leading ________ in ending apartheid(种族隔离政策) in South Africa.
A．use
B．roles
C．role
D．Parts
C