短文改错(共10小题；每小题1.5分，满分15分)In 1972, the United Nations hold a meeting in Sweden【小题1】to share

短文改错(共10小题；每小题1.5分，满分15分)
In 1972, the United Nations hold a meeting in Sweden                                     【小题1】                
to share ideas about ways to take better care of for the                                   【小题2】    
earth．At the summit, people from more than one hundreds                                 【小题3】    
countries discussed some of the important problems faced                              【小题4】    
our planet．Since then, several Earth Summits had been held.                       【小题5】    
In 2002, the Earth Summit was held in Johannesburg.                                   【小题6】    
One of the main theme was “sustainable development”, or                        【小题7】    
the question what we can continue developing the world                                【小题8】    
without damage the environment．Most of the speakers                                【小题9】    
talked the three biggest killers in the world.                                                 【小题10】    hold—held