单项选择题

What caused the blackout in July 1977

A．Excessive heat probably made people switch on too many electrical appliances.
B．Because of unemployment, some machines were not in proper working order.
C．During a storm, lightning damaged supply cables.
D．The passage does not mention the cause.

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热门试题

单项选择题

In what way was the blackout of 1977 not really a repeat performance

A．There was much more disorder.
B．This time the electricity supply failed.
C．It was quite unexpected.
D．It did not occur within five years of 1965.

单项选择题

Why did many looters manage to escape

A．The police could not see them in the dark.
B．Many of the looters were armed with guns.
C．There were not enough policemen to catch them all.
D．They were hidden inside big buildings.