单项选择题

A serious environmental problem resulting from automobiles is _________.

A．tragic loss of life
B．traffic jams
C．air pollution
D．mental stress
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单项选择题
According to the passage, the average number of people killed annually in traffic accidents around the world is _________.
A．18 million
B．250,000
C．half of the world's population
D．60 million
单项选择题
The title that suits the passage best is _________.
A．Automobile and Economy
B．Automobile and the Environment
C．The Problems with the Automobile
D．Advantages and Disadvantages of the Automobile
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