单项选择题

This passage is mainly about______.

A．the advantages of traditional surveying methods
B．using satellites to communicate with mountain climbers
C．obtaining new information about a mountain
D．controlling satellites from the top of a mountain
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单项选择题
According to the speaker, ______make up the illiterate population
A．women
B．prisoners
C．manual workers
D．school children
单项选择题
The conversation is about______.
A．a jewelry store robbery
B．buying a birthday present
C．writing a story
D．doing research for a class assignment
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