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单项选择题

A．measles, HIV, hepatitis.
B．diabetes, hypertension, HIV.
C．hepatitis, syphilis, diabetes.
D．HIV, hepatitis, syphilis.
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单项选择题A．3 bags.B．10 bags.C．they don’t have any bags.D．5 bags.

A．3 bags.
B．10 bags.
C．they don’t have any bags.
D．5 bags.

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.

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．it’s too spicy.B．it’s too salty.C．it’s too bland.D．it’s too sour.

A．it’s too spicy.
B．it’s too salty.
C．it’s too bland.
D．it’s too sour.

单项选择题A．swim in public pools.B．give blood.C．over exert yourself.D．expose your skin to the sun.

A．swim in public pools.
B．give blood.
C．over exert yourself.
D．expose your skin to the sun.