【InventionsPhoneThefirsttelephonewasinventedbyAlexanderGrahamBellin1876．Itmadecommunicationseasier．Butthetelephoneswereonlyfixedinpostoffices．Peoplehadtogotheretomakecallstofarawaypeopleandthefee】

　　Inventions

　　PhoneThe first telephone was invented by Alexander Graham Bell in 1876．It made communications easier．But the telephones were only fixed in post offices．People had to go there to make calls to faraway people and the fees were very high．Later，a cellphone was developed in 1973in America．It was one of the most useful inventions．People can use cellphones to communicate with others much more easily．They can take them anywhere to make private calls，even vision calls （可视电话）．Cellphones have many other functions，such as sending messages，taking photos and reading online．

　　TVThe first TV set was invented by an English scientist，John Baird，in 1926．The invention helped people watch films at home instead of going to the cinema as before．At first，TV sets only broadcast black-white pictures．Several years later，colored TV sets made the pictures lively．However，they were heavy and thick，so it was difficult to move them．Then，digital TV sets came into being．They are light and thin．Many TV programs are available （可获得的） at any time．At present，people can&n