The world is divided (分为)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 , child
starve (饿死)and in the other ,  a lot of people get fatter and fatter and have to
go on diets (吃特别饮食), or do special  exercises in order to lose weigt.     
　　The poorer countries have special problems . Sometimes the land is too
poor to grow  anything on . The land can be improved (改善), but a lot of
things must be done first . The  people must be educated an water must be
found.     
　　But rich countries have problems , too . There 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 or to take  water from . The roads are too crowded to drive
along . Large numbers of people do not have  decent (象样的)housed to live
in . Some things 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.     
Answer the questions :   
1. What’s the difference between the two parts ?     
___________________________  
2. Do the poorer countries have many problems ? What for example ?     
___________________________  
3. Can anything be done about it ?     
___________________________  
4. What must be done, for example ?     
___________________________  
5. Can all this be done easily ?     
___________________________