阅读短文，根据要求完成下面各小题。

The world is divided into two main parts．The difference is that one part is rich and the other is poor．In the poor part, a lot of people never get enough to eat．In the rich part, a lot of people eat too much．In one part, children starve（挨饿）and in the other, （3）a lot of people get fatter and have to go on diets（节食）, or do special exercise in order to lose weight．

The poorer countries have special problems．Sometimes the land is too poor to plant anything．The land can be improved, but a lot of things must be done first．The people must be educated and water must be found．

But rich countries have problems, too．Three are not always pleasant places to live in．Sometimes the air is too dirty to breathe, and the rivers are too dirty to swim in．The roads are too crowed to drive along．（4）Large numbers of people do not have decent（体面的）houses to live in．Something will have to be done about these problems．The air and the river will have to be cleaned, and more houses will have to be built．

（一）根据短文内容简要回答问题。

1．Do the rich countries have many problems? What are they? （At least two items．）

2．What must be done to the poor part?

（二）将短文中划线的句子译成汉语。

3．                                                                                                                  ．

4．                                                                                                                  ．

（三）请给短文拟一个适当的题目。

5．                                                                                                                  ．

根据中文提示，用词组的适当形式填空。每空一词。（每小题1分，共5分）

1.Trees can  ___________ the sand __________ (阻止)  moving toward the rich land. 

2.___________ __________ (多亏) the Great Green Wall, the land produces more crops.

3.My sister is always ___________ __________ (缺乏) money at the end of every month. 

4.We often                    (挨饿)because the boss didn’t give us enough food to eat. 

5.Many animals are  ___________ __________ (灭绝；绝迹) because of all kinds of pollution.