单项选择题

Questions 11～13 are based on the following monologue. By which is the average adult covered

A．Three feet of skin.
B．Twelve yards of skin.
C．Two square feet of skin.
D．Two square yards of skin.

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单项选择题

单项选择题

Questions 11～13 are based on the following monologue. By which is the average adult covered 您的浏览器不支持 audio 元素。