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:2024/05/06 01:29:30
He is lagging behind on his study .
成绩退步His study gets worse than before.
he's study is lagging behind.
he's marks are getting lower