英语被动语态When was computers invented?Who was chopsticks invente

Who invented the first television?（改为被动语态）___ ___ was the fi .When was _____ umbrella _____?A.an; invented B.the; invente 英语-Unit 9 When was it invented? when was this bridge built 被动语态 who invented tea?改为被动语态 Who invented it? 改成被动语态~ 英语who was it invented by 用who 还是whom? when was the ...invented? who were they invented by? what an when was the car invented who invented it是被动语态还是主动语态 被动语态和过去完成时The computer was invented in 1800可以转换为The computer 英语：九年级第九单元When was it invented?