学进去

   Tom was a little boy. He _____ four years old. One day, His mother took him to _____ his grandmother. His grandmother's home was very far from theirs. So they went there _____. There _____ only a few people on the bus. They all sat on their seats. Tom was very happy. He looked out of the window and talked with his mother. Then he began running on the bus. He ran and ran. “_____ are you always running? Please _____” his mother said. “I want to see my grandmother soon. The bus is not _____ enough (足够),” Tom answered.

6．	A．stand up B．walk              C．sit down