Cook has been working on smart homes since 2006. Some test homes in Seattle already show that the technology can help monitor the elderly people and remind them to complete ordinary activities like rising, eating and taking medicine.

　　Similarly, the home can itself control energy use. Smart home technologies can run washers at off-peak times, turn off unneeded appliances(家用电器)and put out lights in empty rooms. Many communities, including Pullman, are testing the concept of the smart home.

　　While the smartphone lets people take their social media with them, the home could act like a car’s Bluetooth, making hands-free conversation from any room a reality and cameras will let the people “talk face to face from anywhere” .

　　Although the technology is available, technologies like in-home cameras raise privacy concerns. The technologies, like many others, face a challenge of being accepted and adopted, says Cook. She has seen that in particular with the elderly participants in her studies.

　　“People will soon understand what these technologies do and see how user-friendly they are. I bet some technologies will develop fast once they’re starting to be used. ”

　　41. According to the passage, all of the following statements about the smart home technology are TRUE except that　.

　　A. it is a completely new concept

　　B. some tests are being carried out

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