【题目】______ this is your first visit to Shanghai, let me show you around the city.
A. Although B. Since C. Unless D. When
【答案】B
【解析】句意:既然这是你第一次来参观上海,让我领着你参观这个城市。A. Although尽管; B. Since 既然; C. Unless除非; D. When当……时候。根据句意故选B。