题目

Robert is fourteen   61   (year) old and in the ninth grade at a middle school near his home. Life is hard for his family. His father,   62   was once a doctor, is now ill in bed. Every morning, after finishing delivering (递送) the newspapers, he   63   (hurry) to school. The school begins   64   8 o’clock every morning. He   65   (usual) earns about 80 dollars a month and   66   (much) during his holidays. He wants to buy a new bike, but he has to spend some of the money   67   ( buy) books and clothes for himself, and he has to spend some of his mone已知，则λ的值是                 ．