As everyone knows, not o{#blank#}1{#/blank#} fast walk but also slow walk does good to the muscles and lungs of human. So people walk to build up their bodies, or to lose w{#blank#}2{#/blank#}. But only some of them know that taking a walk every day is also good for p{#blank#}3{#/blank#} people's hearts. Heart attack has become the first disease in the world b{#blank#}4{#/blank#} more and more people suffer from it.

    Taking a walk can improve the blood supply to our hearts. If you try to walk as o{#blank#}5{#/blank#} as possible, you'll have a healthier heart.

    A Little Horse Crossing the River

    There is an old horse and a little horse on a farm. One day the old horse asks the little horse to send the wheat to the mill(磨坊）。The little horse is very happy. He carries the wheat and runs toward the mill. But there is a river in front of the little horse. He stops and doesn't know {#blank#}1{#/blank#} to do next. Just then Aunt Cow is passing by.

    The little horse {#blank#}2{#/blank#},”Aunt Cow, please tell me. Can I cross the river?”

Aunt Cow answers.” It's not deep, you can cross it.”

    When the little horse begins to cross the river, a little squirrel(松鼠）shouts to him,” Little horse, don't cross it, you will be drowned. Yesterday {#blank#}3{#/blank#} of my friends was drowned in this river.”

    The little horse is very {#blank#}4{#/blank#} .Finally he {#blank#}5{#/blank#} to go home and asks his mother.

    The old horse asks,”{#blank#}6{#/blank#} do you take the wheat back? What's wrong with you, my child?”

    The little horse answers sadly,” There is a river in front of me. Aunt Cow said it was not deep, but the little squirrel said it was deep. What shall I do?”

    The old horse says,” My child, you should try to cross the river by   7    . If you don't try, how do you know the river is deep or not.

    The little horse carries the wheat and    8      to the riverside. At last,he succeeds in   9    the river. Now, he knows    10    deep the river is.