017.
I've just come back from a trip to the USA. During the trip, I visited New York, where I stayed for three days. Unlike the usual fine weather, it was cold, rainy and windy day when I went to the site where the twin towers had been standing, and where new construction work was going on. The New Yorkers were very friendly and helpful. They were willing to answer my questions about the September 11 terrorism attack on the World Trade Center. Since the site was fenced with wire nets, visitors were not allowed to get in. I was lucky that an old couple offered to take me to a nearby high building. Through the big windows on a higher floor, I could see the big hole in the ground and people working down there. It's said that various designs have been collected and are being discussed to replace the emptiness.

答案解析：
(1) 正确答案为B。根据it was cold, rainy and windy day 那天很冷，而且下雨刮风。可知，说话者去双子塔的那天很冷，而且刮风下雨，因此B项正确。
(2) 正确答案为A。The New Yorkers were very friendly and helpful. 纽约人非常友好，而且乐于助人。可知，纽约人乐于帮助别人，因此A项正确。
(3) 正确答案为C。根据new construction work was going on 正在进行新的建设工作。可知，双子塔正在进行建设，将会呈现不同的面貌，因此C项正确。