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Simple Past or Present Perfect?
Decide when to use the Present Perfect tense or Simple past. Take time to decide.
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Simple Past or Present Perfect?
Decide when to use the Present Perfect tense or Simple past. Take time to decide.
Since computers were first introduced to the public in the early 1980's, technology_________ (change) a great deal. The first computers _____(be) simple machines designed for basic tasks. They___________ (not do) much memory and they________ (be, not) very powerful. Early computers were often quite expensive and customers often______ (pay) thousands of dollars for machines which actually____ (do) very little. Most computers___(be) separate, individual machines used mostly as expensive typewriters or for playing games.
Times_______(change). Computers______ (become)powerful machines with very practical applications. Programmers_______ (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 ________(become) faster, more exciting interactive adventures. Many computer users___________ (get, also) on the Internet and__________ (begin) communicating with other computer users around the world. We_____________ (start) to create international communities online. In short, the simple, individual machines of the past____________ (evolve) into an international World Wide Web of knowledge. (To check your results, send an e-mail to beyond_english@hotmail.com)
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