单项选择题

A. It increases with time.
B. It never changes.
C. It decreases with time.
D. It depends on the material it’s made of.
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A. A foreign tourist. B. A hotel receptionist. C. A travel agent. D. A shop assistant.
A. A foreign tourist. B. A hotel receptionist.
C. A travel agent. D. A shop assistant.
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A. Traffic cost. B. Car parks. C. Public transport. D. Road taxes.
A. Traffic cost. B. Car parks.
C. Public transport. D. Road taxes.
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