语法与词汇 12.The other night, Susan was walking______ street after street with her friend.
【正确答案】 D
【答案解析】walk across the street意为“横穿马路”；walk down the street意为“沿街散步，沿着马路的一侧走”；walk through street after street意为“穿过一个又一个街区”，此时street意为“街区”。