阅读短文，根据短文内容，从短文后的A、B、C、D、E五个选项中选出能填入空白处的最佳选项。每个选项只能用一次。
Li Wen is a normal 15-year-old boy who works hard in school and gets good grades．It is hard to believe that he used to be a “problem child” ．Li Wen lives in the Sichuan countryside．As a small child, he seldom caused any problems．
．His parents moved to the city to look for jobs．He had to live with his grandparents．Li Wen began to cause problems for himself and his family．He was no longer interested in studying．_and he failed his examinations．
Finally, his parents made a decision to send him to a boarding school．There were so many rules, and he used to keep breaking them．One day,he told his teacher he wanted to leave the school．and she advised his parents to talk with their son in person．So his parents took a 24-hour train ride and a five-hour bus ride to go back to their hometown．_．To Li Wen’s surprise, their conversation changed his life．…Now Li Wen has really  changed ．He has been working hard and is now one of the best students in his class．“It’s very important for parents to be there for their children,” Li Wen says．

A．However,things bagan to changed a few years ago

B．His teacher was worried about him

C．His pareants were proud of him

D．They had a long talk

E． Sometimes he was abent from classes