Read the following letter. Decide if the statements from 13 to 16 are True or False and choose the correct answer (A, B, C or D) for the questions 17 and 18. Today almost everyone walking down the street has at least one mobile phone in their pocket. That is because many mobile phones are upgraded every year around the world; and most people are interested in changing their old mobile phone for a new one. There has been an estimated number of 90 million unwanted mobile phones in the UK alone! This mountain weighs around 12.000 tonnes, but only about 5°a of it is recycled. What makes us worried most is that mobile phones contain harmful chemicals which are released into the environment when phones begin to degrade and, in addition, large amounts of carbon dioxide are also produced during the manufacture of phones. It seems that the more modern mobile phones become, the worse our environment gets. 13. Mobile phones are modernized every year around the world. 14. Most people are keen on having a newer mobile phone. 15. About half of unwanted mobile phones in the UK are recycled. 16. Old mobile phones do no harm to the environment. 17. What is the passage mainly about? A. The modernization of mobile phones is necessary. B. There are more and more mobile phones in the world. C. The modernization of mobile phones make the environment worse. D. The manufacture of phones produces carbon dioxide. 18. Which of the following can be inferred from the passage? A. Modern mobile phones are worse for the environment than the older ones. B. Mobile phones are getting cheaper and more modern. C. People in the UK are very concerned to recycle old mobile phones. D. Used mobile phones can pollute the environment.