王老师:19139051760(拨打)复制微信 题目 更新时间:2024/8/10 The little boy is dirty from head to foot because he______in the mud all morning.A. has played B. is playing C. has been playing D. was playing 答案 登录 注册 C 出自:国家开放大学 >> 国家开放大学英语语法 山东农业大学继续教育学院