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．Teen pregnancy and difficulty in school.B．Low self-esteem and poor nutrition.C．Difficulty in school and physical abuse.D．Illiteracy and teen pregnancy.
A．Teen pregnancy and difficulty in school.
B．Low self-esteem and poor nutrition.
C．Difficulty in school and physical abuse.
D．Illiteracy and teen pregnancy.
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