单项选择题

A．50%
B．2%
C．4%
D．6%
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单项选择题
A．He will see his parentsB．He will see a doctorC．He will see Professor BrownD．He will see Dean Williams
A．He will see his parents
B．He will see a doctor
C．He will see Professor Brown
D．He will see Dean Williams
单项选择题
A．War.B．Providing services.C．Natural disasters.D．Providing blood.
A．War.
B．Providing services.
C．Natural disasters.
D．Providing blood.
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