根据以上实验回答：

结合材料，运用民族区域自治制度优越性的知识，说明内蒙古经济社会发展的原因。

当我们遇到不公平的事情觉得委屈、困惑时，当我们在矛盾冲突中感到左右为难、举棋不定时，我们的正确做法是（  ）

   People are often killed while c____  the road. Most of them are old people and c____ . Old people are often killed because they are careless. People should look and listen b____  they cross the road. A car, a truck or a bus can't stop very q____ if it is going very fast. It will travel many meters before it s____ . Pedestrian(行人)don't know this. They think that a car can stop right away. It is h____ for a pedestrian to know how fast a car is traveling. The only s____ way to cross the road is to look at b____ ways, right and left. The correct way to cross the road is t____  walk quickly when the traffic l____ turn green.