Please correct these sentences 1. She deserve a medal, because she ran very fast in this competition, althouh she thought, that she will be defeated. 2. Your son has a bad behavior, he need a short-time exclusion from this class. 3. My chief's demains are very difficult, I can't cope even a half of them. 4. A mother gave a permission for her daughter to go to the night-club tonight. 5. He convinced me, I began to believe him again. 6. Overnight he grab a branch and hit a dog. 7. An average amount of plants in this garden are approximately 1000 species. 8. Our relationship is very brittle, it's easy to destroy it.