【简答题】Have you ever heard of Back-to-Front Day? It is a festival in Britain. On that day, the s have to go to school. And the children? They are the policemen and firemen; they sit in the offices and c...
【简答题】“An apple a day keeps the doctor away.” Similarly, if we drink a little more water ever day, we may find that we need to go to the doctor a lot less often. A healthy diet is made up of water and a gre...