GRAMMAR PRACTICE SECTION
| Conditionals 1. Match the sentences with the explanations. | 
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| 1. When you buy a computer in the shop you always get an operating manual. | a. future events that will happen, or likely to happen - 1st conditional |
| 2. If you increase your order of CDs and DVDs, we’ll give you a bigger discount. | b. If or When can be used where the meaning is “every time” - 0 conditional |
| 3. If you surfed the Internet yesterday, you probably learnt the news. | c. imaginary past event, but the result refers to the present - mixed conditional |
| 4. If the program were better, we wouldn’t be doing it for such a long time. | d. things that are always or generally true - 0 conditional |
| 5. When anyone rings my mobile, I get a photograph of the person on the screen. | e. events that are different to what really happened with a suggestion of criticism or regret (imaginary past) - 3rd conditional |
| 6. If I had reinstalled the operating system, my computer wouldn’t have crashed. | f. imaginary, unlikely, impossible future events - 2nd conditional |
| 7. If I had upgraded my computer, I wouldn’t have these problems now. | g. past events which possibly happened |
2. Put the verbs into the correct form in the conditional sentences.
A. If your mobile phone (1) … (can/ talk), it (2) … (can/ reveal) a great deal. If it (3) … (be) privy to your calls and text messages, and possibly your e-mail and diary, obviously it (4) … (know) many of your innermost secrets.
B. Some years ago if your phone (5) … (know) where you were, how you got to work, where you liked to go for lunch, what time you got home, it (6) … (be) a great surprise. But it couldn’t.
C. Now imagine! If it (7) … (be) possible to aggregate this sort of information from large numbers of phones. It (8) … (be) possible to determine and analyse how people move around cities, how social groups interact, how quickly traffic is moving and even how diseases might spread. The world’s 4 billion mobile phones (9) … (be) turned into sensors on a global data-collection network.
D. Phones (10) … also (be) used to collect data in more direct ways. Sensors inside phones, or attached to them, (11) … (gather) information about temperature, humidity, noise level and so on.
E. More straightforwardly if it (12) … (be) necessary, people (13) … (send) information from their phones, by voice or text message, to a central repository. This can be a useful way to gather data quickly during a disaster-relief operation, for example, or when tracking the outbreak of a disease.
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