Read the extract and complete the
sentences.
1 the professor thought there
was light in the cave because
of .
2 while walking on the beach,
axel found shells and
3 hans threw his pickaxe into
the water to see
4 hans said the marks on his
pickaxe were made by
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!