题目

阅读下面短文, 在空白处填入1个适当的单词或括号内单词的正确形式。April Fool’s day is a day 【1】 people can play jokes on others. No one knows for sure how this holiday began. Some English people hold the 【2】(believe) that it began on the day during the 1200s. At that time, King John of England was in 【3】 habit of making a road out of nearly every path he walked regularly. The citizens of one farm village were aware of this. To protect their grass and farms from being destroyed, they built a fence that prevented the king from walking through their countr如图是某台汽油机工作的四个冲程（顺序已打乱），其中将内能转化为机械能的冲程是_______，请按一个工作循环的过程，将四个图重新排序______________。