1. Work in pairs. How many different things do people use mobile phones for? Think of as many as you can in two minutes. 2. Read the text. What happened in 1973, 1986, 1992 and 1997? 3. Study the first two sentences of the text in exercise 2. Then complete the Learn this! box. 4. Find twelve examples of the passive in the text. Which examples are a) plural, b) negative or c) a question? 5. Read the Look out! box. Complete the sentences with the present simple or past simple passive of the verb
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