单项选择题

A．Swim in public pools.
B．Give blood.
C．Over exert yourself.
D．Expose your skin to the sun.
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单项选择题
A．Customer and estate agent’.B．Customer and travel agent.C．Customer and shop assistant.D．Customer and lawyer.
A．Customer and estate agent’.
B．Customer and travel agent.
C．Customer and shop assistant.
D．Customer and lawyer.
单项选择题
A．Shortage of days.B．Superstition.C．Inability to divide the year.D．Too many months.
A．Shortage of days.
B．Superstition.
C．Inability to divide the year.
D．Too many months.
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