Questions 11 to 15 are based on the following passage.
【真题来源：2018年12月大学英语四级真题（第二套）Part Ⅲ，Section C，第46-50题】
Passage One
Roughly the size of a soda can, sitting on a bookshelf, a relatively harmless gadget may be turning friends away from your home. The elephant in your living room is your Internet-connected security camera, a device people are increasingly using for peace of mind in their homes. But few stop to think about the effect these devices may have on house guests. Should you tell your friends, for instance, that they're being recorded while you all watch the big game together?
“It's certainly new territory, especially as home security cameras become easier to install,” says Lizzie Post, president of the Emily Post Institute, America's foremost manners advisors. “I think it will be very interesting to see what etiquette （礼仪）emerges in terms of whether you tell people you have a camera or not, and whether guests have a right to ask that it be turned off, if it's not a security issue.”
Post wants to make clear that she's not talking about legal rights, but rather personal preferences. She also wants to explain that there are no right or wrong answers regarding manners on this front yet, because the technology is just now becoming mainstream. Besides, the Emily Post Institute doesn't dictate manners.
When it comes to security cameras, Post says it's a host's responsibility to make sure guests feel comfortable within their home. “I'm always a fan of being open and honest.” For instance, if the host casually acknowledges that there is a camera in the room by telling a story about it, that may be enough to provide an opening for a guest to say if they are uncomfortable.
However, if a contractor is working in your home, you don't need to tell them that there are cameras watching. Then again, the air of accountability that the camera generates can also work in contractors favor. “If anything does go wrong while they're in the house, they don't want to be blamed for it,” she says. “In fact, the camera could be the thing that proves that they didn't steal the $20, or knock the vase off the table.”
For what reason may your fiends feel reluctant to visit your home?
【定位】 根据题干中的 visit your home 将本题出处定位于第1段第1句。
第1段第1句提到，只有一个易拉罐大小 、放在书架上，且相对没有什么害处的小玩意儿，却可能会让朋友对你家敬而远之。接着第2句指出，这个设备就是安装在客厅里的 联网安全摄像头。A是对第1句信息的同义转述，其中的 feel reluctant to visit your home 对应第1句中的 turing friends away from your home 。
【干扰项】B他们不希望自己的照片在网上流传；C监控摄像头可能对他们的健康有害；D他们也许不愿和您的家人交流。B原文并未提及相关信息，故排除。C监控摄像头可能对他们的健康有害，与第1句中监控摄像头几乎不会带来什么害处相悖，并且文中也未提及到健康这一话题，故排除；D利用第1段多次出现的“家、屋子”捏造出“家庭成员”而设置的干扰项，故排除。
What does Lizzie Post say is new territory?
【定位】 根据题干中的 new territory将本题出处定位于第2段。
第2段第1句提到，“这当然是一个新领域，尤其是现在安装家庭安全摄像头已经不是什么难事儿了”。接着下文指出，就是否告诉别人你家安装摄像头了，以及客人是否有权要求关掉摄像头方面而言，看会出现什么礼仪问题，将会是一件非常有趣的事。由此可知，第一句中的新领域是指有关家中安装摄像头涉及的礼仪问题。D是对第1、2句信息的同义转述，其中的new territory对应第3句中的new territory。
【干扰项】A礼仪建议对公众的影响；B在家应用新技术的成本；C家庭安全设备的使用越来越多。A原文并未提及，故排除；B本段第1句指出现在安装家庭安全摄像头已经不是什么难事了，但并未提及有关安装成本的问题，故排除；C本选项有很大的迷惑性：首先，第一段指出，越来越多的人在家中安装联网安全摄像头，但安全摄像头不等于家庭安全摄像头的应用范围的问题，而是其中涉及的礼仪问题，故排除。
What is Lizzie Post mainly discussing with regard to the use of home security cameras?
【定位】根据题干中的Lizzie Post和the use of home security cameras将本题出处定位于第3段最后一句。
第3段最后一句指出，博斯特想澄清的是她讨论的不是法律权利，而是个人喜好问题。由此可知，关于家用监控摄像头的应用，他主要论述的，是个人好恶问题。C是对该句信息的同义转述，其中的likes and dislikes of individuals对应定位句中的personal preferences。
【干扰项】A法律权利；B道德问题；D对礼仪的可能影响。A定位句明确指出博斯特讨论的不是法律权利，故排除；B是根据该段第2句“关于这方而的礼仪，目前还没有对错之分”而设置的干扰项，且本文并未提及道德问题，故排除；D根据定位段可知，这并非博斯特主要讨论的问题，故排除。
What is a host's responsibility regarding security cameras, according to Lizzie Post?
【定位】根据题干中的a host's responsibility定将本题出处定位于第4段最后一句。
第4段第一句提到，说到安全摄像头，博斯特说确保客人在家里感到舒适是主人的责任。由此可知，博斯特认为主人在监控摄像头上的义务是让他们的客人感到自在。A是对该句信息的同义转述，其中making their guests feel at ease对应定位句中的make sure guests feel comfrtable。
【干扰项】B说明安全摄像头的位置；C及时关闭安全摄像头；D确保客人的隐私。B本段第3句指出主人要是能讲述一件有关于家里摄像头的事儿，漫不经心地承认家里有摄像头，这就足以让客人有机会说自己是否觉得不舒服了，而并非要告诉客人摄像头的位置，故排除；C是对原文内容的过度推断，原文并未指出博斯特认为主人应及时关闭摄像头，故排除；D是根据常识而设置的干扰项，但原文并未提及，故排除。
In what way can the home security camera benefit visitors to your home?
【定位】根据题干中benefit visitors将本题出处定位于第5段。
第5段最后三句指出，摄像头所创造的负责任的氛围对来到家里的承包商有利。博斯特说：“比如，他们在家里工作时，家里确实出了什么问题，他们也不想因此受到指责。”她还提到：”事实上，摄像头可以证明那20美元不是他们偷的，桌上的花瓶也不是他们打碎的。”由此可知，家庭安全摄像头可证明访客的清白。B是对该句话的同义转述。其中的benefit对因该句中的in…favor。
【干扰项】A它可满足他们的好奇心，C它可以帮助他们学习新技术和D它可以使他们的拜访更愉快。文中均未提及，故排除。