Вставьте пропущенные слова hands, tubes, kinds development, replaced, due, calculations, computer, devices, today, boom, faster, example, had, known, these. computers may have a short history but prior to there were many other ways of these calculations were done using__that are still used__; the slide rule being a to mention the ten fingers of machines, unlike computers, are non-electronic and were__by faster calculating devices. it wasn't until the mid-1940s that the first built. the post-war industrial__saw the development of computers take shape. by the 1960s, computers were__than their predecessors and semiconductors__replace vacuum__only to be replaced in a few years by tiny integrated circuit boards. __to microminiaturization in the circuits were etched onto wafer-thin rectangular piecess of silicon. this integrated circuitry a chip and is used in microcomputers of

Computers may have a short history but prior to their development, there were many other ways of doing calculations. these calculations were done using devices that are still used today; the slide rule being a perfect example, not to mention the ten fingers of the hands. these machines, unlike computers, are non-electronic and were replaced by faster calculating devices. it wasn't until the mid-1940s that the first digital computer was built. the post-war industrial boom saw the development of computers take shape. by the 1960s, computers were faster than their predecessors and semiconductors had replaced vacuum tubes only to be replaced in a few years by tiny integrated circuit boards. due to microminiaturization in the 1970s, these circuits were etched onto wafer-thin rectangular piecess of silicon. this integrated circuitry is knon as a chip and is used in microcomputers of all kinds.

1) what are you (talking) about?

2) we have just (talked) about it.

3) he has just (said) something about it.

4) she is (telling) them some interesting story.

5) he has (told) us nothing about it.

6) she has (told) them some stories about dogs.

7)we have (had) two lessons today.