单项选择题

His ______ will be invaluable to understanding technological challenges the BBC is facing.

A．fantasies
B．expertise
C．ideology
D．humanities
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单项选择题
Everyone aboard the ship ______ when it sank off the coast of Maine.
A．nourished
B．perished
C．pitched
D．preached
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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