单项选择题

What happened to the two large jets

A．The pilot of the first plane make a big mistake.
B．They avoided each other by turning in different directions.
C．They narrowly escaped crashing into each other.
D．One plane was suddenly out of control.

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单项选择题What is the possible mason for the candidates fail to get jobs at the BBC

A．Because they are not qualified engineers.
B．Because they have had little exposure to high level of sounds.
C．Because their stereo systems are poor.
D．Because they suffer from hearing loss.

单项选择题The example mentioned in the passage is to show ______.

A．the potential danger in the air travel
B．the importance of the pilots
C．air travel is much safer than other means of traveling
D．the role played by the air controller