查人人中国名人网是一部内容开放、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：查人人中国名人网 时间：2024/05/09 08:40:09
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
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