单项选择题

The tragedy could have been ______ if the crew had followed safety procedures.

A．interfered
B．averted
C．intervened
D．distracted
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单项选择题
Doctors told people that death from a massive heart attack was almost ______.
A．incompatible
B．exceeding
C．instantaneous
D．external
单项选择题
Two suspects have been ______ by the police for questioning.
A．retained
B．detained
C．repelled
D．excelled
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