单选题 Not only do these high tech systems make life more relaxing, but they also do so at no extra cost of time or energy. Every one of these features is designed to be the most convenient to any lifestyle. If a person's favorite TV show is on the same night as the party of the year, then the mart house has already prepared to record it. The wired home can also save people from taking that extra trip to the grocery store by taking inventory of what is needed and making up a shopping list and ordering the food. A smart house can be controlled through a wall-mounted keyboard, a tele-command or even by voice. E-mail or voice mail can be checked from any TV or computer screen in the house because all screens are designed to be interchangeable and multipurpose.
A smart house cannot be controlled

• A. through a computer keyboard.
• B. through a tele-command.
• C. by voice.C. through a big keyboard on the wall.