【正确答案】In the 20th century, mankind created material and spiritual wealth unmatched by any other time in history. Regrettably, it was also in these 100 years that humanity experienced unprecedented hardships, particularly the havoc of the two world wars. But it is always by the people of the world that world history is made and written. Therefore, justice will inevitably prevail over evil, light over darkness and progress over backwardness. Mankind will undoutedly keep overcoming difficulties and obstacles, blaze new trails and steadily move forward to a better future. In the 21st century, though the people all over the world are still confronted with a multitude of formidable challenges, they are also faced with tremendous opportunities for development. As long as they work as one and constitute powerful strength that can prevail over every challenge, the ship of mankind's civilization and progress will surely sail forward by braving the wind and waves.
The world is colorful. People of different countries have traversed different roads, enjoyed different cultural backgrounds, social systems and values and continued different ways of life. This diversity is just the fundamental reason for contest, vigor and innovation in this world. All countries should strengthen the exchange and understanding among them and advance toward a common goal on the basis of mutual respect and equality. They should not allow the diversity to be a barrier to their march forward, still less should they deliberately provoke confrontation and conflict. Respecting and developing the diversity of world culture in which a common interest can be found is a great motive for the social progress of mankind.