We cannot imagine how life is without mobile phones. Today, nearly all teenagers have mobile phones. (12) ________, in the past, most of their parents did not have a mobile phone when they were young and the idea of having one did not even enter their heads.

Twenty-five years ago, young people did not speak (13) __________ to their friends on the phone very much. At that time, there were phones in the home, but these phones were used by the whole family. Instead, young people often met up with their friends and did a (14) ___________ wide variety of activities with them.

Today, many parents (15) __________ happy for their teenage children to have a phone. They think that there are good (16) __________ for them having one. For example, if their children are going out, they can call them to know where they are and what time they will be home.

Today, nearly all teenagers have mobile phones. (12) ________, in the past, most of their parents did not have a mobile phone when they were young and the idea of having one did not even enter their heads.