【答案解析】[听力原文] 15-16 Many people like to decorate their houses at Christmas time. They decorate the inside of the house and the outside, too. Inside they usually decorate a Christmas tree and the fire-place, if there is one. Outside they place wreaths, ribbons, and colored lights on the door and windows. If there is a tree in front of their house, they place colored lights on it, too. In New York, there is a very tall, beautifully decorated Christmas tree in Rockefeller Center at Christmas time. In Washington, there is also a big decorated tree in front of the White House. People come from many cities to admire the trees and the gaily decorated shop windows on the principal avenues of large cities. 主旨大意题。由于独白中出现频率最高的词汇是Christmas和decorate两个词，因此独白的主旨显然就是包含了这两个方面的[B]项，即“圣诞节的装饰”。
单选题
Why do people come to big cities such as New York and Washington at Christmas time?
【正确答案】
A
【答案解析】[解析] 本题为细节题。独白最后一句指出：People come... to admire the trees and the gaily decorated shop windows... 即人们是为了欣赏圣诞树和装饰华丽的商店橱窗而来，这里to引出的介词结构表目的，同时也是原因，故本题答案是[A]。其余两项都属于用原文中的词句设置的干扰项。