2. Pre-reading Have you met some awkward inconvenience in your daily life?

3. Pre-reading Do you know any simple but creative invention that makes inconvenience much more convenient?

4. While reading Answer the following questions. Heated butter knife 1.What is the disadvantage of keeping butter in the fridge? 2.How do people spread the butter if they don’t have a heated butter knife? 3.Where does the heat of the knife come from? The refrigerated butter is not easy to spread. They often take the butter out of the fridge and let it warm to room temperature. It comes from people’s body heat when they hold the knife.

5. While reading Answer the following questions. Solar-powered oven 1.Where does the energy of the solar-powered oven come from? 2.Why is the solar-powered oven a great choice in summer? 3.The oven is very light compared to the kitchen stove, isn’t it? It comes from the sun. Because cooking inside can make a living space hot in summer. Yes, it is.

6. Language Study Complete each sentence with one word in its correct forms. 1. ________ some blueberry jam on the bread and it will taste more delicious. 2. These foods have to be ___________ in the fridge. 3. The sun is in the center of the ______ System. 4. You mustn’t drop water onto __________ appliances. 5. I got my soup ______ on a stove. preserveheatelectricityspreadsolar Spread preserved Solar electrical heated

7. After reading Have you ever invented anything? What is it?