单项选择题

Questions 26 to 28 are based on the passage you have just heard.

A．Fifty underground stations were made waterproof.
B．A flood wall was built.
C．An alarm system was set up.
D．Rescue teams were formed.

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填空题

By saying it might as well begin with the words ’once upon a time’ (Line 3, Para. 1), the author suggests that the American myth is ______ .

单项选择题

Questions 26 to 28 are based on the passage you have just heard. 您的浏览器不支持 audio 元素。