单项选择题

Questions 1 to 5 are based on the following conversation.

A．The unsettledness of travel.
B．The difficulties of trekking.
C．The loneliness of travel.
D．The unfamiliar environment
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单项选择题
A．The Internet file-sharing services have made the entertainment companies lose lots of money.B．The Internet file-sharing companies have led their customers to download copyright materials.C．The Internet file-sharing companies have download copyright materials themselves:D．The Internet file-sharing companies are recovering money by downloading copyright materials.
A．The Internet file-sharing services have made the entertainment companies lose lots of money.
B．The Internet file-sharing companies have led their customers to download copyright materials.
C．The Internet file-sharing companies have download copyright materials themselves:
D．The Internet file-sharing companies are recovering money by downloading copyright materials.
单项选择题
The title that best expresses the ideas of this passage is ______.
A．Philosophy of Mathematics
B．The Recent Growth in Science
C．The Verification of Facts
D．Methods of Scientific Inquiry
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