Jim turned off the lights and then( )the classroom为什么括号里要填lrft,而不是has learned?

Jim turned off the lights and then( )the classroom为什么括号里要填lrft,而不是has learned? Jim had turned off all the lights _______ he left the class.A.after B.until C.since D.before we are late,so the plane__without us A.took off B.turned off C.turned down In a flash of light,the forgs__fish.A.turned up B.turned on C.turned off D.turned into tim turned off the tv when he left the He went into his room, the light and began to work.A. has turned on B. turned off C. turned on D. has turned off Some turned off the light怎样改被动句 （）（）务必the lights are turned off填什么? make sure the lights are turned off.为什么不用making 请说明原因The light in the room__before you leaveA must turn off B will turn off C are turned off D must be turned off Sorry,I'm late.I ---the alarm clock and gone back to sleep againA might have turned off B should have turned off C could have turned off D need have turned off To our surprise, the stranger ___ to be an old friend of our mother’s.A. turned out B. turned down C. turned in D. turned off He tried to join the army,but was____because of his poor healthA.turned off B.turned down C.turned out D.turned away A cold wind began to blow and he ___ his collar to keep out the cold.A.turned up B.turned off C.turned over D.turned downWHY l turned ...the radio and listened ...the music.介词填空 --,the world's transport and communication system would fall apart.A all the electricity turning off B All the electricity turned off C If the electricity being turned off D With the electricity turning off 不太会做When you leave the roommake sure the lights_____Awill be turned off B will be turned on C turn off D have turned off 我觉得是D,答案却是A,这是为什么呢? pollute的同义词语( ) Dora turned the tap off.=pollute的同义词语( ) Dora turned the tap off.= Dora _ _ _ _.