Complete the sentences with the appropriate pronouns. These days more people

Complete the sentences with the appropriate pronouns. These days more people are learning how to use computers. ... of them have to because of their work,... just want to play games,... are actually interested in computing. These days you don39;t need ... money to buy a computer and ... knowledge of computing is required to use one. There are ... of different uses for them, such as letter writing and keeping accounts.