Відповіді: Стр.57 (3-4)

3. Add a sentence to the article to answer the final point in the task.

Yes, I think mobile phones will become even more popular in the future because new technology will make them more useful and important in everyday life.

4. Read the Prepare to write box. What kinds of mistake do you usually make in your writing?

I usually make mistakes with spelling and grammar, especially verb forms. Sometimes I also make mistakes with word order in sentences. I need to check carefully that my verbs agree with the subject and that I use the correct words.