示例:
Long long ago, there was a fox. One day, he was hungry. He went out to look for some food. He saw some nice grapes when he walked by a garden. “ The grapes look so nice,” said the fox happily. “ I want to eat them. I think I can jump high and get them.” So the fox started to jump to get the grapes. He jumped again and again, but he couldn't reach them. At last,the fox had to go away and said angrily, “ I don't want to eat those grapes at all l. They are green. They must be sour !
