单项选择题

A．To find out how shy people are.
B．To change people’’s behavior in social life.
C．To observe people’’s attitude towards strangers.
D．To see how people get along with their friends.
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单项选择题
A．Wars or natural disasters make them lose their families.B．They want to help their families earn enough money to survive.C．They are poor.D．All the above.
A．Wars or natural disasters make them lose their families.
B．They want to help their families earn enough money to survive.
C．They are poor.
D．All the above.
单项选择题
A．One of Etna’’s recent eruptions made many people move away.B．Etna’’s frequent eruptions have ruined most of the local farmland.C．Etna’’s eruptions are frequent but usually mild.D．There are signs that Etna will erupt again in the near future.
A．One of Etna’’s recent eruptions made many people move away.
B．Etna’’s frequent eruptions have ruined most of the local farmland.
C．Etna’’s eruptions are frequent but usually mild.
D．There are signs that Etna will erupt again in the near future.
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