请帮忙分析下句子Oneshouldbecareful,however,ofsupposingthatsilentreadingcameaboutsimplybecausereadingaloudwasdistractingtoothers.Examinationofreasonsconnectedwiththehistoricaldevelopmentofsilentreadingshowsthat

　　请帮忙分析下句子

　　Oneshouldbecareful,however,ofsupposingthatsilentreadingcameaboutsimplybecausereadingaloudwasdistractingtoothers.Examinationofreasonsconnectedwiththehistoricaldevelopmentofsilentreadingshowsthatitbecametheusualmodeofreadingformostadultreadingtasksmainlybecausethetasksthemselveschangedincharacter.

　　1Oneshouldbecareful,however,ofsupposingthat这是什么句式...不懂

　　2Examinationofreasons这是什么意思

　　3剩下的怎么翻译?单词都简单,句子结构也明白但是感觉意思很怪