What caused the blackout in July 1977?

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What caused the blackout in July 1977?

A. During a storm, lightning damaged cable.

B. Because of unemployment.

C. Heat waves had made people use too much electrical power.

D. Because the looters damaged the electricity supply.

参考答案:

A34.答案为A 根据最后一段...when lightning hit andknocked out supply cables可知停电是由于闪电击中了供电电缆。