问题 更新时间2023/4/3 12:59:00 20. His father was ______ in thought and did not hear the door open.(本题2.0分) A、 lose B、 lost C、 cost D、 last 答案 登录 注册 标准答案:B 出自:青书学堂 >> 长春工程学院-大学英语3(专升本)