When Dan Green comes home from work, he doesn't need a key to open his front door. As he walks up to the front of his house, the d    1     opens. The lights turn on inside. His favorite music starts to play. His dinner is r    2     in the oven. B    3     no one     is home. What's happening? This is the home of the future! Right now, Dan Green is the only   person w    4     has a home like this. He is a scientist. But in about 25 years, many   people w    5     have homes like Dan's. His home does not look different on the o    6    . But inside it is very different.

Computers control this house of the future. For e    7    , Dan is watching   television w     8     the doorbell rings. The TV is a computer. When Dan presses a button on the TV remote control, he can see a picture of his v    9     on the screen. He can also use the remote control to open or close the door. Dan can watch TV and answer the door at the same t    10    .