单项选择题

What is the main topic of the conversation

A．The development of the automobile.
B．Declining air quality.
C．The structure of nitrous oxides.
D．Air quality management.
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单项选择题
What is the author’’s attitude towards people’’s superstitious beliefs
A．He is mildly critical.
B．He is strongly critical.
C．He is in favor of them.
D．His attitude is not clear.
单项选择题
According to the passage, which of the following adjectives best describes those people who work in large cities and live in villages
A．Original.
B．Quiet.
C．Arrogant.
D．Insensitive.
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