题目内容：

    Roughly the size of a soda can, sitting on a bookshelf, a relatively harmless device (设备) may be turning friends away from your home. The elephant in your living room is your Internet-connected 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 fix,” says Lizzie Post, president of the Emily Post Institute, America's distinguished manners advisors. “I think it will be very interesting to see what manners appear 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 preference.

When it comes to security cameras, Post says it's a host's responsibility to make sure guests feel comfortable within their home. 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 (合约工) is working in your home, you don't need to tell them that there are cameras watching. Then again, the camera 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.”

1.The visitors are concerned that the security camera may________.

A.threaten their health B.spoil their peace of mind

C.disturb their privacy D.affect their preference

2.How can the home security camera benefit contractors working in your home?

A.It can prevent the accidents happening. B.It can prove their innocence.

C.It can record their working progress. D.It can make their work more enjoyable.

3.What's the author's attitude towards the security camera?

A.Negative. B.Pessimistic. C.Favorable. D.Objective.