国开《理工英语3》单元自测4（预备知识：Unit 4；10分） 形考试题 【题目】— How long is this cell phone guaranteed? — ______ No problem. You can refund it in 7 days and exchange it in one year. Don’t mention it. 试题来源理工英语3 查看整套课程试卷 此内容查看价格为0.2金币，请先登录如有问题，请联系微信客服解决！
