Ben is six years old. His little brother Ricky is four years old. Their mother is a teacher. She goes to
school early in the morning and comes back in the evening. 
     Ben loves to play video games (电子游戏). Ricky likes to watch him play. One day, Ricky said to Ben,
"I want to play, too." So, Ben showed him how.
     That night, their mother was very surprised. She saw Ricky in the living room. He was playing a video
game.  
     "How did he learn to do that?" she asked Ben.
     "I taught him," Ben answered. "See, I'm a teacher just like you."

(     )1. Ben is two years younger than Ricky.
(　 )2. Both Ben and Ricky like computer games.
(　 )3. One day, Ben taught Ricky how to play computer games.
(　 )4. Ben's mother is not at home during the day.
(　 )5. Ben's mother doesn't like to see Ricky play computer games.