翻译下列句子。 1. You should be quiet when you are in the reading room. ____________________________________________________ 2. When I grow up, I'll be a nurse and look after patients. ____________________________________________________ 3. If you don't want to go alone, I'll go with you. ____________________________________________________ 4. After you use plastic bags, you mustn't throw them about. ____________________________________________________ 5. People in the USA can't drink beer or wine before they reach 21. ____________________________________________________