Complete the sentences using while. Follow the model on page 13.
Danger of an electric shock disappears when the faulty parts earthed
One should work on the circuit when the power is off. One should work on the circuit when the power is
Contact with dead conductors is safe ... .
In dry air the risk of an electric shock decreases ... .
Health is very important for human. If you haven't got a strong immunity, you'll catch a cold. If you want to be healthy, you just need follow certain rules, such as: wash your hands, take a bath twice a day, change your clothes. And you must not forget about your food. Your food has to be healthy. Don't eat crisps, don't drink soda. You have to eat vegetables, fruits. Don't bite nails, it's bad for your health. If you have such habit, you need to wean from this habit. If you want to healthy - just follow this this certain rules and everything will be OK!