The world is divided (分) into two parts. One half of the world is rich and         is poor. In the poor part, a lot of people have never got enough to eat. When they are ill,        the hospitals can receive them because they have no enough           . In the rich part, a lot of people          too much. For example, a dog or a cat in North America eats more than a child in poor countries.
The poor countries have some other difficult problems. Sometimes the land is too poor to grow           on. People there don’t have rich land or enough water. The land can be made better, but a lot of things must be done. The people         be taught and water must be found.
But rich countries have problems. too. There’re not good places to         . Sometimes the air is not clean and the rivers are too dirty to swim in or drink. The roads and streets are full of people and buses. Cars and buses have to move         . Noise is too much. Some people don’t have houses. People must do something about the problems.
People must clean the air and the rivers, and they must         them clean. People have to build more houses.        we can’t do these things easily.

根据短文内容完成表格。

The aim(目的) of students who came to school is to study. But to study requires(需要) a right way，or you waste either the time or the money. The following are the ways of studying.

　　The best time for reading is morning，because in the morning，the air is fresh and the mind is clear. For that reason，we can get good results(结果).

　　In studying we must have patience(耐心). If we have not known a text well，we must read it again. We should not read the next one till we have learned the first one.

　　When we are studying，we must put our hearts into the book，or we can get nothing from the book while we are reading.

　　We must always ask "whys". If it is not well understood，write it down and ask our teachers or our parents，or friends. In any possible way，we must know it completely and what we've learned can be used well and made better.

Though there are many ways for studying，yet the above mentioned(提到的) will be quite enough if we can keep them in heart and do so.