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صفحة: 6
Booklet Page 20 : Word Families Use the noun form of the highlighted verb to complete the sentence . Use a dictionary to help you . a . The radio was invented in the early 1900 s . This changed how people got the news . b . When you send a fax , you connect to the telephone line . This sends the image in digital code . c . Computer designers are always looking to improve the speed of computers . These make computers faster and easier to use . d . In the 18 ch and 19 th centuries , many small companies produced tooth creams and powders . It was only in 1873 that the Colgate Company started mass of toothpaste . Booklet Page 20 : More Practice 1 . Complete the following sentences , using suitable words from each group . a . ( imagined , imagination , imaginative ) Science fiction writers many modern inventions before they were made . For example , the submarine and diving suits were first created in the mind of author Jules Verne . b . ( operate , operation , operative ) Today , doctors can on people by using sound waves . This makes the much less complicated . c . ( introduced , introduction , introductory ) In 1981 , IBM _ the world to DOS , a new computer operating system . The _ of DOS helped make Microsoft a successful company .
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