Nowadays more and more Chinese teenagers find life more difficult without their parents. They don't know how {#blank#}1{#/blank#}housework. Because their parents do almost everything for them at home. This is a big problem.

    Joy is 14 years old. One day her parents{#blank#}2{#/blank#}away on business(出差), so they asked Joy {#blank#}3{#/blank#}home alone. At first she thought she would be happy {#blank#}4{#/blank#}her parents were not in. She could do what she liked. But it was six o'clock {#blank#}5{#/blank#}the afternoon, she felt hungry.“Oh, it's time {#blank#}6{#/blank#}supper. Where can I get my food?”she said to herself.Later she found some food in the fridge, but she didn't know how to cook.At that moment, she missed her{#blank#}7{#/blank#}very much. At last she could only go to the supermarket and{#blank#}8{#/blank#}some food to eat.

    Many teenagers are the {#blank#}9{#/blank#}as Joy. So I think they should learn some basic life skills,{#blank#}10{#/blank#}as cooking, cleaning their rooms or dressing themselves properly. They shouldn't depend too much on their parents.

    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!