Paul: Hey, Jenny, the subject for my school project is "Small invention that changed the world". Can you help me think of an invention?

Jenny: With {#blank#}1{#/blank#}! Let me think ... hmm ... I know! The zipper!

Paul: The zipper? Is it {#blank#}2{#/blank#} such a great invention?

Jenny: Think about how often it's used in our {#blank#}3{#/blank#} lives. You can see zippers on dresses, trousers, shoes, bags ... almost everywhere! I saw a website last week. The {#blank#}4{#/blank#} of different inventions were listed there. For example, it mentioned that the zipper was {#blank#}5{#/blank#} by Whitcomb Judson in 1893. But at that time, it wasn't used widely.

Paul: So when did it become popular?

Jenny: Around 1917.

A group of classmates got together to visit their old teacher. These classmates all had good jobs and made lots of money. They talked {#blank#}1{#/blank#}.The teacher asked them the difficulty they had had. Then their talk soon turned to talking about the stress (d压力) in work and life, The teacher went to {#blank#}2{#/blank#}kitchen and came back with a large pot of coffee and many{#blank#}3{#/blank#}—China ones, plastic ones and glass ones. Some are plain looking, some are expensive and some are lovely. The teacher told them to help{#blank#}4{#/blank#} to the coffee.

    When all the students had a cup of coffee in hand, the teacher said,“ Can you notice that all of you took nice-looking expensive cups, leaving behind the plain and cheap ones? You want only the{#blank#}5{#/blank#}for yourselves, and it is the source of your problems.”

    “What all of you really wanted was coffee, not the cup{#blank#}6{#/blank#} you went for the best cups and then began looking at each other's cups.”

    “Now{#blank#}7{#/blank#} about this; life is the coffee, and the jobs, money and position in society {#blank#}8{#/blank#}the cups. They are just tools to hold, and do not change the life. Sometimes, by caring only about the cups, we{#blank#}9{#/blank#} to enjoy the coffee.{#blank#}10{#/blank#} don't let the cups drive you, and enjoy the coffee instead.”