单项选择题

A．100 pages.
B．140 pages.
C．400 pages.
D．440 pages.
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单项选择题
A．Broadening of horizon.B．Promoting hobbies and interests.C．Coping with social problems.D．Personal improvement.
A．Broadening of horizon.
B．Promoting hobbies and interests.
C．Coping with social problems.
D．Personal improvement.
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