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Questions 17-20 are based on the following passage. You now have 20 seconds to read the questions 17-20 What is the purpose of building new houses facing north or south

A．To avoid direct Sunlight.
B．To keep out the cold.
C．To limit space used.
D．To conform to other houses.

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单项选择题

单项选择题

Questions 17-20 are based on the following passage. You now have 20 seconds to read the questions 17-20 What is the purpose of building new houses facing north or south 您的浏览器不支持 audio 元素。