A、become screens of movie theaters B、become as large as walls in home C、have no change D、become smaller B

The telephone that you will use before long will be much more complicated than the one you use today. It will be a video phone, a phone that can transmit and receive pictures as well as sound. With a video phone you not only hear, but also see the person you are talking to. People will be able to hold business conferences by using video phones. Each person in the conference will sit in his or her own office and talk with others in the conference held in other cities.
    The telephone of the future will be more convenient to use than today’s telephones. You will be able to dial almost any city in the world. You will also be able to dial people from almost any place in the world, even if they live in the countryside. Besides being able to dial great distances, you will have less trouble with busy signals. When you call someone and the line is busy, you can simply have the phone call you back. When the line is free, you will get your call and go ahead with your message.
    Television will bring changes in many ways also. Screens will become larger. You can have one wall of size if you wish. It will be like having a movie theater in your own home. Most programs will probably reach you by overhead satellite. Some of these programs will be shown on all TV sets free of charge within a certain area. There will be other special programs that you may select if you wish to pay for them. There will be programs about certain subjects on video tapes that you may borrow from your public library. You will be able to hook these into your home TV set and enjoy them just as you would have a regular TV program. You will be able to watch your special program any time you choose.