根据课文完成短文。
Dr Richard Fairhurst, 17 new book The New Age of Invention has just been published, is an 18 (invent) himself. He thinks there have been golden ages of 19 (invent) throughout history and the present day is 20 new age for inventions. Most of the new great inventions are 21 (base) on advances in virtual reality, wearable tech, the flexible battery, madicine and 22 (environment) science. 3D printers have been used to make replacement hearts and bone parts. 23 terms of the environment, it is now possible 24 (create) an intelligent walking house. It is capable of using GPS technology to travel to different places, with computing technology 25 (control) its “legs”. Solar technology can be eco-friendly, too. Most inventions start with recognising a problem that 26 (need) a solution. That people have an incredible desire to think and create, and that is the real spirit of invention.