单选题
New York City's first large electric sign, (which was) over six stories (high) and topped by a (forty-feet-long) green signboard, (appeared) on the side of a building in 1900.
【正确答案】
C
【答案解析】此句意为“纽约市的第一个电子标志于1900年被树立在一座建筑物的旁边，它高度超过六层楼，顶上耸立着一根40英尺长的绿色招牌”。“40英尺长”中的 forty, feet, long三词以连字符连接时，feet应为单数foot。类似的用法还有“一名6岁的小女孩”：a six-year-old little girl。