单项选择题

Which statement is TRUE

A．The average waist size for a man is 36～38 in.
B．The average waist size for a woman is 30 in.
C．In the mid-Eighties, more than half million under-16s in the U.K. are classed as overweight.
D．The obesity pandemic has now spread to South America.

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单项选择题

What does the word sedentary (Line 2, Para. 2) mean

A．Sit still.
B．Eat too much.
C．Study very hard.
D．Passive thinking.

单项选择题

Obesity increases the risk factor of ______.

A．diabetes, short sight, cancer, strokes
B．diabetes, cancer, strokes, psychosocial illness
C．cancer, strokes, fatty, heart disease
D．strokes, heart disease, diabetes, headache