"Listen carefully to what I say," the time traveler said, "I shall tell you something that you will not agree."  

 "Why will we not agree?" I asked.

 "Because the science and mathematics you know are not correct,"  he said. "You believe there are only three dimensions(三维空间)-length, breadth(宽) and thickness." 

 "There is nothing to argue with that, " the youngest member of our little group said.

 "Exactly!"  the time traveler answered, "But there is also a fourth dimension - time."   

 "We all know about time, " another member of the group said. "Time passed."

 "I do not agree,"  the time traveler said, "Length, breadth and thickness do not pass. They stay in the same place in space.  We move about them. I can prove that time is the same. It does not pass. We move in time the same way that we move in breadth, length and thickness."

 None of us believed the time traveler, and we argued with him for many hours.

 "If we could travel back in time,"  the scientist said, "We could do things to change the future." 

 "If we could travel forward in time," the doctor(博士) said, "we could do things that change our present." 

 The time traveler smiled, "It is clear," he said, "that there is only one way I can show you that I am right. We must do an experiment. Please wait here." 

 He left the room and soon returned, carrying what looked like a clock.

 "This is a model of a time machine. It took me two years to make it," the time traveler said. "I want all of you to understand that when I start the machine, it will immediately travel in time and disappear from the present." 

 He turned to the youngest of all. "Give me your hand," he said.

 The young man put out his hand. The time traveler took it and placed it on the machine. Immediately, there was a sudden wind, and the little machine disappeared.

 I was certain this was not a trick, but the doctor was not so sure.

 "Are you asking us to believe," he said, "that the machine is now in a different time?" 

 "Certainly! In my laboratory, a full-size machine is almost complete. As soon as it is complete, I shall send myself on a journey through time. Would you like to see my machine?"

 "Are you serious about this?" the doctor asked.

 "I have never been more serious about anything," the time traveler said, "Come." 

We followed him to his laboratory. There, we saw the actual machine, not quite complete, but large enough for a man to sit in.

    It was Saturday morning. Kate got up early and had breakfast quickly. She was so excited. She was going to the zoo with her family today! There was a new kind of animal in the zoo. It was called sloth (树懒) and it was from South America. Kate never saw a sloth before. She could not wait to see it.

    When Kate and her family got to the zoo, there were already lots of people around the sloth. The sloth was staying in a tree! It looked so cute! Kate looked at the animal for about ten minutes, and then she asked, “Are you sure it is alive (活的), Dad? I don't see it moving at all.” “Of course it is alive,” her father said. “But a sloth can only move really slowly.”

    Kate's family went to see some other animals. Then they went back to the sloth after lunch. Kate looked at the sloth carefully. It was really at a different place, near the place where it stayed in the morning. “You are really lazy, Mr. Sloth,” Kate said. “I think you should do more exercise. It is good for your health.”

    Winnie the Pooh is about 100 years old. It is my favourite, and I'm sure it's also yours. Do you know how it came to our life?

    Winnipeg is a place in Canada. Many years ago, Harry, a soldier, went to Europe from here. When he stopped at train station, he saw a man selling a little black bear. Harry bought it and named it Winnipeg. The name became Winnie in short later.

    Harry went to a lot of places. When he got to London, he left Winnie in the London Zoo. He thought they could look after Winnie.

    Near the zoo, there was a boy named Robin. He loved to visit the London Zoo with his dad. Winnie was his favourite animal. Robin's father was a writer. He wrote the bear in one of his poems for the first time. Later he wrote stories about Winnie and Robin. Slowly, the father wrote more characters(角色) like Piglet, Rabbit, Roo and Tigger and so on in his stories.

    One morning, a hungry fox (狐狸) sees a chicken. He thinks, "Great! This is my breakfast." He comes up to the chicken and says, "Good morning, Miss Chicken. I hear you can sing very well. Can you sing a song for me?" The chicken is happy to hear that. She closes her eyes and begins to sing. The fox sees that and catches her in his mouth and takes her away. The farmers on the farm see the fox. They shout, "Look! Look! The fox is taking the chicken away." The chicken says to the fox, "Mr Fox, can you hear? The people say you are taking their chicken away. Tell them I am yours, not theirs." The fox opens his mouth and says, "Miss Chicken is mine, not yours." Just then the chicken runs away from the fox and flies into the tree.