46. For what reason may your friends feel reluctant to visit your home?
- A. The security camera installed may intrude into their privacy.
- B. They don't want their photos to be circulated on the Internet.
- C. The security camera may turn out to be harmful to their health.
- D. They may not be willing to interact with your family members.
答案：A
答案句：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?
参考译文：大约一个汽水罐大小，放在书架上，一个相对无害的小装置可能会让朋友远离你的家。你客厅里的大象是你联网的安全摄像头，人们越来越多地使用这种设备来获得家中的安心。但很少有人停下来思考这些设备可能对客人产生的影响。例如，当你们一起观看大型比赛时，你是否应该告诉你的朋友他们正在被录像？
定位线索：题干“friends feel reluctant to visit”→答案句“turning friends away from your home”；文中“being recorded”对应选项A“intrude into their privacy”。
解析：题干问朋友不愿来访的原因，答案句首句直接说“may be turning friends away from your home”，随后指出是安全摄像头，并问“Should you tell your friends...that they're being recorded”，说明录像涉及隐私，对应A项“intrude into their privacy”。B项“照片在网上传播”、C项“危害健康”、D项“不愿与家人互动”均无原文依据，属无中生有。
49. What is a host's responsibility regarding security cameras, according to Lizzie Post?
- A. Making their guests feel at ease.
- B. Indicating where they are.
- C. Turning them off in time.
- D. Ensuring their guests' privacy.
答案：A
答案句：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.
参考译文：谈到安防摄像头，波斯特说，主人的责任是确保客人在家中感到舒适。“我一直喜欢开诚布公。”例如，如果主人通过讲述一个关于摄像头的故事来随意承认房间里有摄像头，这可能足以给客人一个开口的机会，让他们说出自己是否感到不舒服。
定位线索：题干“host's responsibility”→答案句“it's a host's responsibility to make sure guests feel comfortable”；文中“feel comfortable”对应选项A“feel at ease”。
解析：题干问主人关于摄像头的责任，答案句直接说“it's a host's responsibility to make sure guests feel comfortable within their home”，“feel comfortable”与A项“feel at ease”同义，对应A项。B项“指示摄像头位置”是举例中的做法而非责任，C项“及时关闭”未提及，D项“确保客人隐私”范围过大，均属偷换概念。
50. In what way can the home security camera benefit visitors to your home?
- A. It can satisfy their curiosity.
- B. It can prove their innocence.
- C. It can help them learn new technology.
- D. It can make their visit more enjoyable.
答案：B
答案句：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.”
参考译文：然而，如果承包商在你家工作，你不需要告诉他们有摄像头在监视。再说，摄像头产生的责任感也可能对承包商有利。“如果他们在房子里出了什么事，他们不想被指责，”她说。“事实上，摄像头可能是证明他们没有偷20美元或没有把花瓶从桌子上撞下来的东西。”
定位线索：题干“benefit visitors”→答案句“work in contractors' favor”；文中“proves that they didn't steal”对应选项B“prove their innocence”。
解析：题干问摄像头如何惠及访客，答案句说“the air of accountability that the camera generates can also work in contractors' favor”，并举例“the camera could be the thing that proves that they didn't steal the $20”，即证明清白，对应B项“prove their innocence”。A项“满足好奇心”、C项“学习新技术”、D项“使访问更愉快”均无原文依据，属无中生有。