单项选择题

A．By displaying their feelings and emotions.
B．By exchanging their views on public affairs.
C．By asking each other some personal questions.
D．By greeting each other very politely.
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单项选择题
A．How birds’ nests have evolved.B．Why some birds’ nests am considered primitive.C．How birds learn to build nests.D．Why birds lay eggs.
A．How birds’ nests have evolved.
B．Why some birds’ nests am considered primitive.
C．How birds learn to build nests.
D．Why birds lay eggs.
单项选择题
A．Searching for reference material.B．Watching a film of the 1930s’.C．Writing a course book.D．Looking for a job in a movie studio.
A．Searching for reference material.
B．Watching a film of the 1930s’.
C．Writing a course book.
D．Looking for a job in a movie studio.
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