问题 更新时间2023/12/31 18:18:00 The old womahas three sons ,and _____ are studying abroad now.·A two of them ·B two of who ·C two of whom ·D of whom two 答案 登录 注册 单选题·A two of them 出自:青书学堂 >> 延安大学PowerPoint 图文演示技术