Read the following passage. Choose the letter (A, B, C or D) to indicate the correct word or phrase that best fits each of the numbered blanks.

Life before mobile phones

Today, nearly all teenagers have a mobile phone and cannot imagine life (18) __________ one. But most of their parents did not have a mobile phone when they were young – the idea of one did not even enter their heads.

Twenty-five years ago, young people did not (19) __________ to their friends on the phone very much. There were phones in the home, but these were used by the whole family. Instead, young people often (20) __________ with their friends and did a variety of activities with them.

Today, many parents are happy for (21) __________ teenage children to have a phone. They think there are good reasons for them having one. For example, if their children are out, they can phone them to find out where they are and (22) __________ they will be home.