At that time,Edison was only sixteen years old改为同义句At that time,Edison was only ____ _____ boy.

At that time,Edison was only sixteen years old改为同义句At that time,Edison was only ____ _____ boy. at that time 用法 at that time at what time at that time呢 at the time when/that at that time等于什么? at that time与at this time的区别 at that time和at the time的区别? at that time 和 at the time的区别? at that moment ；at this moment ；at this time ；at that time分别用什么时态? during that time与at that time有什么区别? by that time 与at that time 区别? Edison edison at that time和at that moment 有什么区别? at that moment和at that time区别帮帮忙 at that time和at that moment 有什么区别? 高中英语之定语从句,1.I'll remember the time( )we spent together in the country.A.that B.when C.during which D.at which2.Much ( ) I have read has been nonsense.A.which B.as C.that D.where3.We've all heard of Thomas Edison,( ) invented the ele