单项选择题

Passage Two
Questions 29 to 31 are based on the passage you have just heard.

A．Benjamin Franklin’s life.
B．Lightning electricity.
C．The lightning rod.
D．The Empire State Building.

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问答题

1．能源短缺问题已经非常严重；2．可以采取节能措解决能源短缺问题；3．你的看法。

单项选择题

Passage Two Questions 29 to 31 are based on the passage you have just heard. 您的浏览器不支持 audio 元素。