1. choose the appropriate tense-form. 1. a. - what have you done/have you been doing with my knife? where is it? b. - i've put it back in your drawer. a. - (taking it out) what have you done/have you been doing with it? the blade's all twisted! have you been using/have you used it to open tins? 2. a. - do you see those people on that little sandy island? they have been waving/have waved their handkerchiefs for the last half-hour. i wonder why. b. - they need help. the tide is coming in and very soon that island will be under water. have you sat/have you been sitting calmly without doing anything to help them? a. - i have never been/have never been being here before i haven't been hearing/haven't heard about the tides here. what's up? what are you looking for/have you been looking for? have you lost/have you been losing something? 3. a. - are you still painting/have you been still painting your country house? b. - yes. i'm painting/i've been painting it for several days already. i think it'll look beautiful when it's finished.
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computer firm formed in our lives. with them we work, rest, play, learn. with the development of new technologies and the increasing level of demand from consumers. pc is already overshadowed by its "volume" and the price. the future of laptops and tablets. i would like to talk about laptops.laptops - this is probably one of the most convenient, practical and compact computers, it is clear to any first grade! speaking of schools, the last year or two schools stopped buying a pc for computer classes because not only price, but also to how much space is required for the technique itself. for example, in rural schools or schools with a lot of people prefer to buy laptops, because at any time, you can minimize, remove, and carry no computer science, but, for example, mathematics or biology. in offices, where desks pile of papers, documents, etc., also use the laptops can be a lot more to list where they are used, because as mentioned above, the laptop - this is the future.manufacturers of computer technology is not sitting idly by. each month, come more and more powerful "beasts", which capture more and more ordinary users. according to statistics, in 2011 with a pc "boarded" in the notebook for more than 60% of the population of europe. now, with breakdowns of old pcs, 75% are buying laptops. they are also popular among students - in fact it is a laptop to communicate.of all the categories of laptops that existed in 2007, today we can count only two or three. almost disappeared bulky multimedia models, and netbooks were practically driven out, and ultrabukami subnotebooks. in spite of this gaming laptops are still available on the market, and enjoyed good demand.msi company presented one of its new gaming laptop. msi gt783.eto just super-notebook for gamers! but it is understood that this "monster" stuffed with all possible additions and is not cheap: not much, but a lot of 98,000 rubles! vryatli average russian is able to fork out for such purchases. therefore, there are many other, cheaper, and sufficiently powerful laptop computers. they let companies lenovo, hp, samsung, asus and more. each company has its pluses, minuses, as well as its price range. currently, each manufacturer tries to produce low cost version of the popular models, so that each person can buy a laptop according to your taste, choice and purse
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