1、Unit5Meetingyourancestors[基础回顾]Ⅰ.单句语法填空(导学号02516357)1. It isassumedthatstressismainlycausedbytoomuchwork.2.Ifyoudon'tliketheschoollunch,youhave the alternativeofbringingyourown.3.Shehaskeptupphysicaltrainingforseveralyearswithout interruption (interrupt).4.Themoreweareawareofthe significance (