14. Translate the sentences with contact clauses.
1. We know like charges repel each other and unlike charges attract each other. 2. The molecules every substance consists of are in a state of constant motion. 3. What is the title of the book you have spoken about with you friend? 4. The book contains the electrical circuit data you will need to be familiarized with in order to carry out your work as an electrician. 5. Make sure power is disconnected before repairing any electrical device. 6. If a machine has low efficiency, this does not mean it is of limited use. 7. Metals we need for these experiments are semiconductors.
8. Farmers know energy savings on a farm mean more money in the farmer’s pocket. 9. If electrical equipment you are working with is damaged, do not use it. 10. We know electric potential is energy of an electric charge expressed in volts. 11. There are several devices you need to be careful of. 12. There are two categories materials may be divided into conductors and insulators.
15. Join each pair of sentences, making the subordinate clause a contact clause.
Pattern
I bought a book yesterday. It will help me solve this problem.
The book I bought yesterday will help me solve this problem.
1. You are working with a device. It is safe and reliable.
The device ____________________________________
2. We are going to visit a power station. It is situated in California.
The power station _______________________________
3. I want to use a device. Unfortunately it is out of order.
Unfortunately the device _________________________
4. The letter hasn’t arrived yet. I posted it three days ago.
The letter _____________________________________
5. Professor Brown lives in a house. It is very old.
The house _____________________________________
6. I have to use a machine in my job. It costs over a million pounds.
The machine ___________________________________
7. We live on the Earth. It is magnetic.
The Earth ______________________________________
8. Electricity is a form of energy. We use it every day.
The form of energy ______________________________
9. Most of the electricity is produced in our town. We use it.
Most of the electricity ____________________________