单项选择题

A．Father and daughter.
B．Mother and son.
C．Teacher and pupil.
D．Doctor and patient.
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单项选择题
Ocean Resource Exchange is a company to carry its trade and lease activities through electronic commodities exchange.
A．Y
B．N
C．NG
单项选择题
The number of young offenders could be reduced by the way of______.
A．new legal measures
B．better residential care
C．brief periods of harsh punishment
D．examination of their backgrounds
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