Long long ago, there was a very old man called Yu Gong. There were two {#blank#}1{#/blank#} Near his house. They were so high and big that it took a{#blank#}2{#/blank#} time to walk to the other side.The old man told his family that they should help him to move the mountains.
    Yu Gong and his family kept on digging day after day and year after year. {#blank#}3{#/blank#} a god was so moved {#blank#}4{#/blank#} Yu Gong that he sent two gods to take the mountains away.
    This story reminds us that you can never know what will happen {#blank#}5{#/blank#} you don't try to do it．

    “Thank you” is widely{#blank#}1{#/blank#}in a modern society. It is a very good manner. You should say “Thank you”{#blank#}2{#/blank#}others help you or say something kind to you. For example, when someone{#blank#}3{#/blank#}the door for you, when someone says you have done your work well, when someone says you have{#blank#}4{#/blank#}a nice shirt, or your city{#blank#}5{#/blank#}very beautiful, you should say “Thank you”. “Thank you”is used not only between friends,{#blank#}6{#/blank#}between parents and children, brothers and sisters, husbands and wives.

    “Excuse me”is{#blank#}7{#/blank#}short polite usage. We use it the same as “Thank you”. When you hear someone say so behind you, you'll get to know that somebody wants to walk past you without{#blank#}8{#/blank#}you. It is not polite to interrupt (打断) others while they are{#blank#}9{#/blank#}. If you want to have a word with one of them, please say “Excuse me”{#blank#}10{#/blank#}, and then begin to talk. You should also do so when you want to cough or make any unpleasant noise before others. Let's say “Thank you” and “Excuse me” on the right occasion.

A: Hi, Tom!

B: Hi, Dave!

A: What do you want to be in the future?

B: My{#blank#}1{#/blank#}is to be an inventor.

A: Oh,{#blank#}2{#/blank#}do you want to invent?

B: I want to invent a{#blank#}3{#/blank#}car.

A: Special? Can you tell me{#blank#}4{#/blank#}about it?

B: Of course. The car will have three{#blank#}5{#/blank#}and two wings. It can run on the road, fly in the sky and swim in the water.

A: That sounds great! I hope you will be successful.

B: Thank you.

A: You're welcome.

A: Hello, Anna! {#blank#}1{#/blank#} are you going?

B: I'm going to Sunny Restaurant to have dinner with my friends.

A: Why don't you {#blank#}2{#/blank#}to go to Green Restaurant? It's better.

B: Really? What's special about it?

A: A reporter has said that it has the most {#blank#}3{#/blank#}seats.

B: Sounds great. What is the food in it like?

A: It has the {#blank#}4{#/blank#}and the most delicious food. And the food there is the cheapest, too.

B: How about the waiters there?

A: Oh, they work the most carefully and are very friendly.

B: Thanks for {#blank#}5{#/blank#}me so much.

A: You are welcome.

    Years ago, many zoos kept all kinds of animals in small cages. Small cages made it easy for people to see the animals, but a small cage is not a good place for an animal to{#blank#}1{#/blank#}free.

    Today zoos keep animals in different kinds of cages. The cages are very big and{#blank#}2{#/blank#}. They usually have plants and lakes. The cages look like the animals' habitats (栖息地).

    Zoos help to{#blank#}3{#/blank#}all kinds of animals. How do zoos do this? Zoos teach people how animals live in the wild. Zoos want people to help protect the animals' wild habitats. Many plants and animals are going extinct. Mammoths(长毛象), {#blank#}4{#/blank#}Asian elephants, are now extinct, There are no mammoths in the world today. Scientists say that seventy-four different kinds of living things go extinct every day!