The world is divided(划分) into two parts. One half of the world is rich and the other is poor. In the poor part, a lot of people have n{#blank#}1{#/blank#} got enough to eat. When they are ill, none of the h{#blank#}2{#/blank#} can accept them because they have no money. In the rich part, a lot of people eat too much. For example, a dog or a cat in North America eats b{#blank#}3{#/blank#} than a child in the poorer countries.

    The poor countries have some difficult p{#blank#}4{#/blank#}. Sometimes the land is too poor to grow anything on. People there have neither rich land nor enough water. The land can be made better, b{#blank#}5{#/blank#} a lot of things must be done. The people must be taught and water must be found.

    But in rich countries, there are not always good places to live in. Sometimes the air is not clean and the rivers are too dirty to swim in or to d{#blank#}6{#/blank#}. The roads and streets are full of people and buses, and buses have to move slowly. Noise is too much. Some people don't have houses. Something must be done about these problems. The air and the rivers must be cleaned and be kept clean. More houses have to be built. However, these can't be done e{#blank#}7{#/blank#}. It needs lots of time and money.