I’m reading a _______________________book at the moment. 2. In fact, this book is a little ____________________ for me to understand. 3. We can learn a lot ____________________ these books. 4. What do you know about ________________________engineering? 5. Electricity is a kind of energy that flows like water through an ______ wire. 6. Electricity is used to provide _____________________ for machines. 7. Electricity is also used for _______________________ and lighting. 8. We mustn’t touch electricity because we may get an __________________. 9. We get electricity from _____________________ through wires and cables. 10.Thin wires are _________________________ to thick wires called cables.