单项选择题

A．By greeting each other very politely.
B．By exchanging their views on pubic affairs.
C．By displaying their feelings and emotions.
D．By asking each other some personal questions.
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单项选择题
A．Scholarship.B．Language talent.C．Screening system.D．Scholastic ability.
A．Scholarship.
B．Language talent.
C．Screening system.
D．Scholastic ability.
单项选择题
A．For scientific study.B．For field guides.C．For entertainment.D．For some film background sounds.
A．For scientific study.
B．For field guides.
C．For entertainment.
D．For some film background sounds.
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