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听第 8 段材料,回答第 10 至 12 题。 10 . What will the boy do this afternoon? A . Go skating. B . Clean their dormitory. C . Help the girl do some cleaning. 11 . What does the boy think of their dormitory? A . It's easy to clean. B . It's just in a little mess. C . Its mess is beyond description. 12 . How often do the boy and his roommates clean their dormitory? A . Every two months. B . Every other three months. C . Every other two months.