局内投交邮件有效证件包括()。A.居民身份证 B.户口簿 C.工作证 D.驾驶证 发布时间:2017-11-10 10:23 │ 来源:www.tikuol.com 题型:多项选择题 问题: 局内投交邮件有效证件包括()。A.居民身份证B.户口簿C.工作证D.驾驶证
题型:多项选择题 —Look! The lights in the teachers' office are still on. Is Mr. Li working? —No. It _______ be Mr. Li. I saw him leave just now. [ ]A. may not B. mustn't C. can't D. needn't 查看答案