2．What does “it” refer to in Paragraph 3?

　　A．Hollow space. B．Baseboard vent.

　　C．Fresh air from outside. D．Heat in the building.

　　解析：选C。细节理解题。从第三段中的“Fans suck fresh air in from the atrium，blow it upstairs through hollow spaces under the floors and from there into each office through baseboard vents (通风口)．”可知，新鲜空气通过通风口，另外让它上升变暖，最后被烟囱从天花板吸走，可知这里的it指“新鲜空气”。故选C。

　　3．Why would a building like Eastgate Not work efficiently in New York?

　　gkxx.comA．New York has less clear skies as Harare.

　　B．Its dampness affects the circulation of air.

　　高中学习网 www.gkxx.comC．New York covers a larger area than Harare.

　　D．Its temperature changes seasonally rather than daily.

　　解析：选D。细节理解题。根据倒数第二段中的“This is all possible only because Harare is 1,600 feet above sea level，has cloudless skies，little dampness and rapid temperature changes—days as warm as 31℃ commonly drop to 14℃ at night.‘You couldn’t do this in New York，with its hot summers and fantastically cold winters，’”得知，只有一定海拔高度，并且白天气温30度而夜晚气温14度的条件才能实现，而纽约的天气是季节变化而不是需要的那种特殊天气。故选D。

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