How do you sleep? Most people sleep on their backs or sides. Do 1 sleep the same way? Actually, the ways they sleep are very 2 – they can lie (躺) down, sit or stand while they sleep.
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
