单项选择题

Passage one Questions 26 to 29 are based on the passage you have just heard.

A．Experts in every field.
B．American president.
C．European countries.
D．Members of Congress.

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单项选择题

单项选择题

Passage one Questions 26 to 29 are based on the passage you have just heard. 您的浏览器不支持 audio 元素。