单项选择题

A．Retirement age.
B．Old people’s health.
C．Keeping health.
D．Old people’s salary.
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单项选择题
A．$ 13.B．$ 25.C．$ 38.D．$ 28.
A．$ 13.
B．$ 25.
C．$ 38.
D．$ 28.
单项选择题
A．Yes, it is.B．It’s red one.C．No, it isn’t.D．It’s very beautiful.
A．Yes, it is.
B．It’s red one.
C．No, it isn’t.
D．It’s very beautiful.
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