Saving energy doesn't have to be expensive or time-consuming, but what can you do to save energy? There is plenty that you can do to keep the process of energy conservation. You can save energy by doing things like making sure that the kettle doesn't contain more water than you need, always washing a full load in the washing machine rather than a half load, or turning up your air-conditioner by 2°C - this could cut your electricity bill by 10%. Make sure that hot water is not left running and replace washers if your taps drip. When you're not using them, turn off any lights and your computer. Changing to energy-saving light bulbs - these use much less electricity and often last eight times longer than ordinary bulbs. Drawing back your curtains and using natural light during the day, and turning off electrical appliances that are not in use, make a big contribution to energy saving too. IX. Put a correct preposition in each of the blanks. (1 pt) 1. Nick used to go to the library from time to time to look at articles on the subject he was very fond of. 2. This job would be impossible without the help of a computer. 3. At first, my English homework was full of mistakes. 4. Please write in ink; it's hard to read if you write in pencil. 5. If you have a problem, talk to the teacher. 6. Good there, tax is more expensive than travelling by bus. X. Rewrite each of the following sentences, using the word given, keeping its meaning unchanged. (1 pt) 1. Charles lives quite close to his aunt's house. (NEARBY) 2. Unless my father stops smoking, he'll be ill, according to the doctor. (CONTINUES) 3. Would you take an interest in astronomy? (INTERESTED) 4. Our shop doesn't have a robot cheaper than this one. (CHEAPEST) 5. You don't need to finish your assignment this evening. (NECESSARY)