在大型运动会比赛上，运动员要进行尿检和血检，你一定知道下列哪项物质最有可能是兴奋剂的成分（   ）。

①向社会主义过渡方式的改变          ②所有制结构的改变

③经济管理体制的改变                ④分配制度的改变

阅读下面的材料，根据要求写一篇不少于800字的文章

最近，网上一则消息引发热议：一老太太误将邻居自家院子里种的洋水仙当做韭菜偷割，并做成饺子给孙子吃，导致孙子食物中毒。老太太伙同子女来闹，理由是不该种植有毒植物，故意害人。老太太报警后，警察出于人道主义让种植洋水仙的邻居赔偿部分医药费。邻居感觉很是冤枉。对此有网友说，老太太理应后果自负；也有网友说警察处理不当；还有网友说，种植洋水仙的邻居不该赔偿医药费。

鉴于以上观点。你更认可哪一种？请将你的看法写成一篇不少于800字的文章。要求结合材料内容及含意，体现你的思考；选好角度，确定立意，明确文体，自拟标题，不要套作，不要抄袭。

     April Fool's Day is supposed to be a day to play jokes on others in hopes of getting a good laugh and making one feel like a fool. However, the April Fool's Day of 2013 was quite different for my morn and me.

     That day my friend Jimmy and I were playing a game. I had dropped down from a bar(横木) many times in the past without ever having a problem, but that day the simple act of dropping to the ground became a nightmare(噩梦). I broke my arm.

Jimmy's dad heard my crying and rushed out to see what was going on. When he saw the

problem, he quickly put me into his truck and went inside to telephone my mom and let her know he would take me to the hospital. As that day was April Fool's Day, Mom was not buying it and really thought all this was a big joke. Mom was finally convinced(说服) by Jimmy's room. When she saw me, she broke down in tears because she felt so bad--she originally (起初) thought this was just a big prank(恶作剧).

      I guess one could compare this to the story of "The Boy Who Cried Wolf". Since I had pulled pranks before, it is no wonder that my morn didn't believe it. I as well as my morn was made to look like a fool that day. We both learned a valuable lesson.