阅读下面材料，在空白处填入适当的内容（不多于三个单词）或括号内单词的正确形式。
There was a boy who was sent to a boarding school(寄宿学校). He used to be ______ brightest student in his class. He was at the top in every ______ (compete). But things _____ (change) when he came to the new school. His grades started dropping and he was lonely all the time. He felt he was worthless and ______ no one loved him.  His parents began to worry, but they did not know what was wrong. So his dad decided to visit the school and have a talk ______ him.  They sat on the bank of the lake near the school. The father started asking ______ some questions about his classes, teachers and sports. The he asked, “Do you know, son, why I am here today?”  They boy said, “_____ (check) my grades?”  “No, no,” his dad replied, “I am here to tell you that you are important for me. I want to see you happy. Nothing could be _____ (valuable) than your happiness. You are my life” The boy felt confident ______ his study again. He knew there was someone on the
earth ______ cared for him deeply. He meant the world to someone.