Question

Największy wynalazek według Ciebie . napisz po angielsku , 120 -150 słów.

Answer 1

Mobile phone is an invention without which many people today cannot imagine living. It was developed in the 1970s in the United States. First mobile phones were big and heavy and as they were very expensive, only a small number of people could afford them. In order to operate, the device needs a cellular network owned by mobile network operators. It works thanks to radio waves that it receives and sends.

The operators are often multinational corporations earning billions of dollars who fight among themselves for the customers, luring them with promotions, attractive offers, and cheap...