2.Skim the following text. Then read it by the sentences and try to fill in the blanks with one of the four words given in the table. FROM THE HISTORY OF PERSONAL COMPUTERS

In 1977, Apple, the first company in the world to develop personal computers, sold about 1,000 of them. In 1981, they (1) 200,000. So the computer (2) from a mysterious thing into a household(3).

Computers, as we know them today,(4) first developed during the Second World War. (5) they were used to (6) break the codes used to(7) secret information. After that, they were(8) for doing calculations for the(9) H Bomb tests. In fact, the(10) they do hasn't changed, what has changed is the(11) they do it. Basically, computers do(12) that's all.

They can calculate many sets of (13) in many different ways and very(14). This is called number-processing. Which (15) and how the computer processes them(16) on the programme. This is a set of(17) specially written for each job the(18) has to do. So, whether the computer is(19) to design a certain equipment or to(20) will depend on its

programme.​