1. Mobile phone, computer, the ink-jet printer, phone tooth, virtual keyboard, washing-machine. 2. Of course, they do. Opinions differ, because we all have different tastes and thoughts. That's why the gadget I like can be alien to my friend. - it's any object that is interesting for its ingenuity or novelty rather than for its practical use - Yes, we can. - In some cases "Hot gadgets" are really a waste of money. But it depends on gadget and its usability. - I think, that mobile phone is one of the "cool" inventions. If you have it, you can connect with your friends, parents, classmates... Anybody you want. The only disadvantage is the fact, that it's expensive and you should recharge an account in case of need. Also there are a lot of useful functions in mobile phone: games, calendar entry, stopwatch and so on. I can't imagine my life without mobile phone. 3. - A shaver is used for shaving beard - a toaster is used for making toasts - a can-opener is used for opening tins of food - a food fryer is used for frying food in - a tea maker is used for making tea in - a food mixer is used for mixing food 4. Of course, I have heard about the wearable computers. They are easy-to-use and mobile. I'd like to have one. 5. Хм... Здесь сомневаюсь, поскольку по контексту очевидно какое-то чудо-изобретение, очередной гаджет. Возможно, вы проходили это в учебном заведении. Увы, в этом вопросе я не компетентна :) Дословно это означает "гав-гав". Также, маленькие дети называют так собак :) (A child's word for dog) 6. Yes, James Auger and Jimmy Loizeau have developed a "phone tooth". 7. It means that the buyer must bear the risk for the quality of goods purchased unless they are covered by the seller's warranty ("будь бдителен"). 8. - 9. In 1875 Mendeleyev put forward his new element, called gallium. 10. - 11. -