读旅游计划卡片，回答下列问题。

    A crow(乌鸦) is thirsty. He finds a little water in a bottle(瓶子). But the neck(颈部) of the bottle is long. The crow can't get the water. The crow thinks(想) and thinks. He puts some little stones in the bottle. The water rises up(上升). Now he can drink the water. What a clever crow!

（Sarah is asking a policeman for help）

Sarah: Excuse me. Where is the Zhongbai Supermarket, please?

Policeman: It's next to the hospital over there.

Sarah: Is it far from here?

Policeman: No.

Sarah: How can I get there?

Policeman: You can walk there.

Sarah: Thank you.

Policeman: You're welcome.

    Two hundred years ago, there were no telephones or mobile phones in China. People wrote letters to get in touch with their friends or relatives.

    Once there was an old woman, she lived alone in a village. Her son was working in the city. One night she missed her son. She could not get sleep. She wanted to write a letter to him. But she could not read or write. After some time she got up and knocked on her neighbour's door.

    “Mr. Lee, could you please write a letter to my son for me?" she asked. It was the middle of the night and Mr. Lee wanted to sleep. He didn't get up or open the door. He said loudly to the woman, I wish I could help you but I have a problem. My handwriting is very bad at night. Only I can read it. If I write the letter now, I'll have to visit your son and read the letter to him. Maybe you should come back tomorrow.”

    I'm Mike. I like school because I can learn many things at school. We have four classes in the morning and two classes in the afternoon. I like weekends, too. We don't go to school on Saturdays or Sundays. I often play basketball with my friends on Saturday mornings. I wash my clothes on Saturday afternoons. I often do homework on Sunday mornings. And I often go to the park on Sunday afternoons.

What's different?