单项选择题

Questions 19 to 21 are based on the conversation you have just heard.

A．A meeting with directors in the bank.
B．Schedule for a business trip.
C．The building, of a new plant.
D．Reservation of flight tickets.

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Standby power consumption accounts for 5 percent of the total amount of electrical power consumption in the United States.

单项选择题

Questions 19 to 21 are based on the conversation you have just heard. 您的浏览器不支持 audio 元素。