单项选择题

According to the passage, icebergs origins from a build-up of _________.

A．turbulent water
B．feathers
C．underwater pressure
D．snowflakes
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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
The author states that icebergs are rarely seen because they are _________.
A．surrounding by fog
B．hidden beneath the mountains
C．located in remote regions of the world
D．broken by waves soon after they are formed
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