单项选择题

A．To observe people’s attitude towards strangers.
B．To see how people get along with their friends.
C．To change people’s behavior in social life.
D．To find out how shy people are.
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单项选择题
A．He wants to be invited to a concert.B．He told them what his favorite hobbies are.C．He doesn’t really enjoy classical music.D．He doesn’t know much about classical music.
A．He wants to be invited to a concert.
B．He told them what his favorite hobbies are.
C．He doesn’t really enjoy classical music.
D．He doesn’t know much about classical music.
单项选择题
A．By predictions.B．By recording.C．Through observation.D．Through interviewing.
A．By predictions.
B．By recording.
C．Through observation.
D．Through interviewing.
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