Edison began selling newspapers on a train when he was 12.(同义句转换)_____the______of12,Edison began_____ _____newspapers on a train.

Edison began selling newspapers on a train when he was 12.(同义句转换)_____the______of12,Edison began_____ _____newspapers on a train. 这段话为什么是selling?不是sold?为什么是selling?Thomas Edison started work on the railway when he was twelve,selling(为什么是selling) newspapers... Edison edison selling selling The Shanghai Post Bureau began selling “Year of the Pig” stamps at 98 post Selling Leads When selling up becomes selling By the time he was twelve,Edison had began to make a living by himself.这个句子中的by,是直到还是到的意思,还有had能不能换成have? 我看不懂?Thomas Edison was one of the greatest inventors in the world.Without his inventors,people may not have lights,films and many other things.But this very elever man had very little scholing.Edison began to make a talking machine in 1877.At Thomas Edison英文简介 Thomas Edison的生日 谁是Thomas Edison Thomas Edison 是谁? thomas edison的生日 edison什么意思 Edison啥意思啊?