Слова в скобках и есть лишние
MY PET'S A ROBOT
For people who want a real pet but aren't able to look after one scientists in Japan have developed (as) a robotic cat called NeCoRo. It can (to) sit, stretch and "sleep", although it can't walk. When you stroke it, it will purr, wiggle its (the) ears and move its head, and sound sensors in its ears mean NeCoRo can recognise its name when you (to) call it. Doctors in the US were (so) impressed by the robotic cat. They have been using it to help (the) long-stay patients in hospital. Studies have shown that (by) stroking a cat can make people feel relaxed and happy, (bat) with the robotic cat they don't have to (be) worry about feeding it or having to find a litter tray.