Complete the sentences with the appropriate pronouns. These days more people are learning how to use computers. ... of

 These days more people are learning how to use computers. Many of them have to because of their work, some just want to play games, few are actually interested in computing. These days you don\'t need any money to buy a computer and no knowledge of computing is required to use one. There are many of different uses for them, such as letter writing and keeping accounts.