单项选择题

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

A．Nuclear weapon.
B．Violence in crime.
C．Living standards.
D．The population of the elderly people.

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单项选择题

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We use such early biases to make life easy, as well as _______________.

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。