初中英语完形填空：A boy

A boy was sent by his parents to a boarding school. Before being sent away,this boy was the 1 student in his class.He was at the top in every competition.But the boy changed after 2 home and attending the boarding school.His grades started dropping.He hated being in a group.He was lonely all the time.

His 3 started worrying about the boy.But even they did not know 4 was wrong with him.So his dad 5 to travel to the boarding school and talk with him.They sat on the bank of the lake near the school.The father started 6 him casual questions about his classes,teachers and sports. 7 some time his dad said,"Do you know son,why I am here today?"