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．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.
单项选择题
A．her bags.B．her passport and tickets.C．her children.D．her seats.
A．her bags.
B．her passport and tickets.
C．her children.
D．her seats.
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