单项选择题

Passage Three
Questions 33 to 35 are based on the passage you have just heard.

A．Winter in Alaska.
B．The brave Alaskan people.
C．Alaskan transportation today.
D．A dog sled race.

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A bird flu, a massive earthquake, a monster storm and a terrorist attack are all threats to major cities in the U.S.

单项选择题

Passage ThreeQuestions 33 to 35 are based on the passage you have just heard. 您的浏览器不支持 audio 元素。