A girl comes back from school. She doesn't look happy. Her grandma asks,"What's wrong, my girl?" "Everything is wrong. The new school is far from home. I don't have any friends at the new school. I can't answer the teachers' questions in class. I don't like the school lunch," the girl answers. Grandma smiles and says, "Don't be sad, my girl. Would you like something to eat?" "Good. What can I have?" the girl becomes happy. "Here, have some cooking oil ." "No, I can't eat that." "What about some raw eggs?" "No. Nobody eats raw eggs." "Would you like some _ then?" "Grandma, I can't eat these things." "Then what about a cake?" "Good. I like that." "Cooking oil, raw eggs and flour are not nice to eat. But when you put them together in the right way and bake  them, they will make a wonderful cake. Life is just like  baking a cake." Why does the girl look unhappy?
Because she doesn't like the new school life. Because she is hungry. Because her parents are not at home. Because her teachers don't like her.