Read the following passage and put the verbs in the correct form, present perfect or past simple. (5 marks)Then and now Twenty years ago few people realized (realize) that computers were about to become part of our daily lives...

Read the following passage and put the verbs in the correct form, present perfect or past simple. (5 marks) Then and now  Twenty years ago few people realized (realize) that computers were about to become part of our daily lives. This short period of time has seen (see) enormous changes, in business, education and public administration. Jobs which _________________(take) weeks to complete in the past, are now carried out in minutes. Clerks who _______________ (spend) all day copying and checking calculations are now freed from these tedious tasks. In offices, the soft hum and clicking of word processors_________________(replace) the clatter of typewriters. Schoolchildren ____________________ (become) as familiar with hardware and software as their parents _________________ (be) with pencils and exercise books. Computerization of public records __________________ (enable) government departments to analyze the needs of citizens in details. Some of us may wonder, however, whether life ______________ (really/improve) as a result of these changes. Many jobs __________________ (disappear), for example, when intelligent machines ________________ (take) over the work. Employers complain that clerical staff ______________ (become) dependent on calculators and cannot do simple arithmetic.