Надо написать present perfect continuous .She worked for this company. After 25 years she retired. ( : 1) 2.The orchestra began playing. After ten minutes a man ran into the hall. ( : 1) 3.My sister studied French. Then, after five years, she went to France. ( : 1) 4.Margaret went to the park. After ten minutes she realised she had forgotten to close the door. ( : 1) 5.We sat down to dinner. After five minutes the door-bell rang. ( : 1) 6.We settled down in London. After a fortnight our two cousins joined us. ( : 1) 7.Mother started cooking dinner. After ten minutes Hazel came to help her. ( : 1) 8.The family began watching an interesting film. After half an hour the TV broke down. ( : 1) 9.We had arranged to meet in the cafe. I came and began waiting. After fifteen minutes I realised that I had come to the wrong cafe. ( : 1) 10.Brian was trying to fix his car. After three hours he gave up the idea.
Ex 1
1. in year four seasons
2. My favorite season is summer
3. It's warm in the summer, you don't need to go to school, you can hang out with friends on the street until late
4. walk outside
5. Stay at home and play computer games
6. weather in Krasnodar in sprink sometimes cold sometimes warm
Ex 2
Present Simple
1. I sometimes plays computer Games
2. I usually walks with me friends
Present Continuous
1. We are cooking now
2. I go to park with my family at the weekend
Present Perfect
1. I have readed a book
2. They drunk water
Ex 3
Put the proper words into sentences:
analytical, digital, unreliable, sophisticated, solve, core, processor, computations, an integral circuit.
1)The Difference Engine could ... equations and led to another calculating machine, the ... Engine, which embodied the key parts of a computer system: an input device, a ..., a control unit, a storage place, and an output device.
2)Ada Lovelace helped to develop instructions for carrying out ... on Babbage machine.
3)J. Atanasoff devised the first... computer to work by electronic means.
4)First-generation computers were ..., the main form of memory being magnetic...
5)In the third generation software became more...
6)What was the name of the first ... computer to work electronically?
7)When electricity passed through the ..., it could be magnetized as either “ofF’ or “on”.
8)A ...is acomplete electronic circuit on asmall chip of silicon.