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
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
单项选择题
Which of the following statements best describes the organization of the second paragraph
A．Two contrasting views of a problem are presented.
B．An evaluation is explained and then reasons are given.
C．A problem is examined and possible answers are given.
D．Historical view is explained in comparison with the present.
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