Compléter Past Simple or Present Perfect SimpleVersion en ligne Using the words in parentheses, complete the text below with the past simple or present perfect simple. par Michiel Hellemans 1 Since computers were first introduced to the public in the early 1980's , technology ( to change ) a great deal . The first computers ( to be ) simple machines designed for basic tasks . They ( to have / not ) much memory and they ( to be / not ) very powerful . Early computers were often quite expensive and customers often ( to pay ) thousands of dollars for machines which actually ( to do ) very little . Most computers ( to be ) separate , individual machines used mostly as expensive typewriters or for playing games . Times ( to change ) . Computers ( to become ) powerful machines with very practical applications . Programmers ( to create ) a large selection of useful programs which do everything from teaching foreign languages to bookkeeping . We are still playing video games , but today's games ( to become ) faster , more exciting interactive adventures . Many computer users ( to get / also ) on the Internet and ( to begin ) communicating with other computer users around the world . We ( to start ) to create international communities online . In short , the simple , individual machines of the past ( to evolve ) into an international World Wide Web of knowledge .
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