Edison’s experiments with electricity (7) the world greatly.为什么用 has changed为什么要用单数？

Edison’s experiments with electricity (7) the world greatly.为什么用 has changed为什么要用单数？ Edison edison 首字母Edison's mother had to t_____him herself.Edison learnt very q_____. 20.I know some inventions of .A.Edisons B.Edison’s C.Edison D.Edisons’ My dream is to be a s＿ like Edison edison's mother found him a clever boy的同义句edison's mother found him____ a clever boy 一道关于动词时态的英语题.By the time he was ten,Edison already did experiments in chemistry.中,为什么用already did,而不用already had done? Most of Edison's inventions c___ people's life根据首字母填空·· the scientist's experiments gave birth to a new drug at last Edison's mother had to t________ him herself （首字母填空） Thomas Edison was one of the great （s ) in the world. Edison's monther taught him a lot ,and found him ____ (interest ) in science .interested .为什么 They were ( ) by Edison's thinking cap.A.inventing B.invented Most of questions had nothing to do with Edison's lessons. some inventions of Edison's于that novel of Dickens' 格式的区别 为什么前面是's 后面是s' Edison’s mother taught him a lot,and found him____in scienceA.interesting B.interest C.interested D.to interest 被动语态变主动语态,A story of Edison's boyhood will be told by our teacher要说理由