把下面几个句子组成语意连贯的一段文字，排序正确的一项是(　　)

①在古代，这个信念有些神秘色彩

②在一切比较深入的科学研究后面，必定有一种信念驱使我们

③对于数学研究则还要加上一点：这个世界的合理性，首先在于它可以用数学来描述

④可是发展到现代，科学经过了多次伟大的综合，如欧几里德的综合，牛顿的综合，爱因斯坦的综合，计算机的出现，哪一次不是或多或少遵循这个信念？

⑤这个信念就是：世界是合理的，简单的，因而是可以理解的

判断正误

   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.

——***《对日寇的最后一战》