单项选择题

Questions 29 to 31 are based on the passage you have just heard.

A．Gold was discovered.
B．The transcontinental railroad was completed.
C．The Golden Gate Bridge was constructed.
D．Telegraph communications were established with the East.

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单项选择题

A．At the department store.B．At the office.C．In the restaurant.D．in the drug store.

A．At the department store.
B．At the office.
C．In the restaurant.
D．in the drug store.

Questions 29 to 31 are based on the passage you have just heard. 您的浏览器不支持 audio 元素。

Questions 29 to 31 are based on the passage you have just heard.