were Not many people know that mobile phones 7 (EXIST) for quite a long time. There were even some wireless or mobile phones in the 1940s but they were big, expensive and difficult to use. Forty years 8 (LATE) there 9 (BE) much more progress in cell phone technology and ordinary people started to use such phones However, they still very expensive and much 10 (BIG) than they are today. Now mobile phones are cheap and they 11 (USE) to do a lot of useful things: take photos, find information on the Internet, and even watch TV programmes. It is not easy to find a person who can leave home without a mobile phone. Many people say that it makes 12 (THEY) feel nervous if they forget their phones at home. Even 13 (CHILD) of the first grade ask their parents to buy them smartphones. They say that everybody in their class has a mobile phone