by the time 区别Thomas Edison __ already ___a chemistry lab for himself by the time he___tenA.has,built,was B.had,built,was C.would,build,was D.was,building,wasHe'll be a professor by the time he _____ forty five .A.is going to be

by the time 区别Thomas Edison __ already ___a chemistry lab for himself by the time he___tenA.has,built,was B.had,built,was C.would,build,was D.was,building,wasHe'll be a professor by the time he _____ forty five .A.is going to be in time ,on time ,by the time 的区别, when与by the time的区别 the first time,for the first time,by the first time用法区别 the first time,for the first time,by the first time怎么区别呢? by which time和by the time 区别两个都能引导从句,有什么不同 for the first time,first time,the first time和by the first time的具体用法和怎样区别? by the time ,by then By the time by the time 对括号内部分提问：The kight bulb was invented by Thomas Edison.The light bulb was invented by Thomas Edison. by which time ,in which time 区别 Thomas Edison ____ already ____ a chemistry lab for himself by the time he ____ ten.A.has…built…was B.had…built…was C.would…build…was D.was…building…is the light bulb was invented by （Thomas Edison）对括号部分提问 time pass by 与 time go by 有什么区别? as time goes by和time goes by的区别 time gose by 与time went by区别 3.The light culb was invented by Thomas edison.对最后两个词提问--the light bulb-by?