... the University of Pennsylvania in 194 6 although computer – like machines were built in the 19th (2)…… Computer were sold (3) …… for the first time in the 195 0s, and a lot of progress has been ... option (a b, c, d) that best completes the passage TV first (1)…… some fifty years ago in the 195 0s Since then, it has been one of the most popular sources of (2)……… for both the old and the ... much in our work and they are playing a big part in our lives Many people believe we can look (9) ………to the day when even our household jobs like cleaning, ironing, decorating will be done by...