单项选择题

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

A．Rapid population growth.
B．Real estate speculators.
C．Corrupt city government.
D．Lack of immigration quotas.

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What does both in the last paragraph stand for

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