单项选择题

Questions 22 to 25 are based on the conversation you have just heard.

A．To get help with the course.
B．To chat with Jack socially.
C．To hand in their assignments.
D．To practice giving interviews.

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Owing to its delicate design and advanced technology, Swiss Re Tower in London uses less energy than those traditional office buildings by______.

单项选择题

Questions 22 to 25 are based on the conversation you have just heard. 您的浏览器不支持 audio 元素。