你想让无人机给你送快递吗？词数 150 建议阅读时间 4分钟You buy a new toy online. It should come today. Knock, knock. You open the door, but can’t see a delivery person. Instead, a drone (无人机) has put the package (包裹) at your door!
21世纪报社版权所有，未经书面授权，禁止转载或建立镜像。 主办单位：中国日报社 Copyright by 21st Century English Education Media All Rights Reserved 版权所有 复制必究 京ICP备13028878号-12京公网安备 11010502033664号
京公网安备 11010502033664号
