高校问答是一部内容开放、自由的互动网络百科全书客观、专业、权威的知识性百科全书
来源:百度文库 编辑:高校问答 时间:2024/05/11 12:46:49
A duck behind two ducks. A duck in front of two ducks. A duck between two ducks. How many ducks are there? You answer:(three ducks)