One day, a student asked his teacher, "what is greed?" The teacher didn't answer his question{#blank#}1{#/blank#} , but asked the student to walk through the chocolate factory next to their school and pick out the biggest chocolate bar（条、块） he could find．But there was a {#blank#}2{#/blank#}: as he passed through the factory, he could not turn back.

    The student went to the chocolate factory. As he walked, he saw a large chocolate bar. He liked it, but thought he might be able to find an even bigger one if he kept going. He kept walking and saw {#blank#}3{#/blank#} chocolate bar. This one was a little bigger. But {#blank#}4{#/blank#}, he thought he could find an even bigger one if he kept going. As he neared the end of the factory, he saw fewer chocolate bars, and {#blank#}5{#/blank#} of them were as large as the earlier ones. He started to regret his decision to keep going. Finally, he {#blank#}6{#/blank#}. He went back to his teacher empty-handed and explained what had happened.

    The teacher told him, "You liked the {#blank#}7{#/blank#}chocolate bar, but you kept looking for a bigger one. And later, you realized that you had given up the best chocolate bar because you thought you could do better. That is called greed."

    Today , people in the world have busy lives, and they often feel unhappy under so much pressure (压力). In fact, keeping happy is {#blank#}1{#/blank#} and necessary for everyone. Most people want to be happy, but few know how to be happy. Money and success can bring pleasure; however, it won't {#blank#}2{#/blank#} long. Actually(实际), happiness {#blank#}3{#/blank#} on ourselves. Here are some {#blank#}4{#/blank#} to help you to be happy.

    The first secret is to enjoy the {#blank#}5{#/blank#} things in life. We often spend too much time thinking about the {#blank#}6{#/blank#} , for example, going to a famous university or getting a good job after graduation. You should enjoy the simple pleasure in {#blank#}7{#/blank#} , such as reading a good book, listening to your favorite music and spending time with good friends.

    The second secret is to be {#blank#}8{#/blank#}. Many people enjoy dancing or playing sports. You can forget all your {#blank#}9{#/blank#}  and think only about the activity you are doing.

    The third secret is to help others. It is a good way to keep happy. You always feel happy when you do something {#blank#}10{#/blank#} for someone. You can do chores(零工) for your parents, help a friend or a classmate, or go shopping to buy food for an old neighbor.

    In a word, learning to be happy is good for your health.