When the teacher said: "I need somebody to help me out with this job of buying a grammar book. I've lots of things to do this week andI can't take care of everything. Is there anybody willing to help?”Francesca , who is a very generous , helpful girl, put her up hand immediately. "What do you want me to do?" she asked. " Something very easy but risky. You have to collect the money from your schoolmates and when the bookseller comes to bring us the books,you'll pay him. Do you feel like doing it?" "No problem, teacher" was the immediate answer. "Thank you very much, but remember you'll be responsible for quite a lot of money. Are you sure you want to do it?" "I did it last year for the Maths teacher and everything was OK."OK then, colllect 10 euros from each of your schoolmates in, let's say, a week's time."It took Francesca 10 days to collect all the money because somebody forgot to ask their parents and had to ask the following day.Then Francesca set the deadline and nobody forgot any longer. She was ready for the bookseller but for some reasons or other the bookseller kept postponing his coming.