单项选择题

According to the passage, icebergs are dangerous because they _________.

A．usually melt quickly
B．Can turn over very suddenly
C．may create immense snowdrifts
D．can cause unexpected avalanches
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单项选择题
Which of the following is the best title for the passage
A．The Melting of Icebergs
B．The Nature and Origin of Icebergs
C．The Size and Shape of Icebergs
D．The Dangers of Icebergs
单项选择题
What is the main idea of this passage
A．Different life styles led by the American women.
B．American women were free to step into nontraditional roles.
C．American women worked hard to establish their roles in American history.
D．American women were independent because they did not have to follow the regulations at all
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