阅读理解。
A
Tim was a little boy of nine years old. He was busylast Saturday morning, because he went to the park with his friends to paint.
He returned home very late. It was nearly half past twelve, but nobody was in. He found that there was a note on the table. Itread: 
Tim didn't want to follow his parents everywhere. He felt so good that he could be a real big boy and look after himself.
Thinking there was nothing important out there, he cooked some noodles for himself and also helped himself to some apple juice.
Then he started to do some housework. He was really a good helper to his mother. When his mother was away, he could always find some housework to do, like sweeping the floor and washing the dishes. He felt it quite right for him to do some housework at weekends.
In the late afternoon, his parents came back. He asked them what happened.
“Why? You forget? It's Grandmother's birthday today.”
“Uh, gee! I simply forgot! I must telephone Grandmother.'
He picked up the phone.
“I'm terribly sorry, Grandma, that I forget about your birthday. Anyway, anyone will forget one thing or another. So I won't get worried if you forget my birthday next Tuesday.”
