what would happened if sth.hadn't been invented?what would have happened if the telephone hadn't been invented?and television ,internet

what would happened if sth.hadn't been invented?what would have happened if the telephone hadn't been invented?and television ,internet They never knew what _______ in a hundred yearsA.will happen B.happened C.is happened D.would happen What had happened?What had happened?What had happened? 是What happened 还是what’s happened what happened=what's happened吗? what happened to 和what happened 求英语作文what would you do when an earthquake happened what would you do if something happened that could not happen? 什么意思 what happened to you?you can tell me if you would like to? What would have happened if only two of the sixteen water-tight compartments had been flooded? “I did not know what happened to you ...But i wished you would happy forever .颖. They never knew what( )to the world in a hundred years.是would happen 还是would be happened? what happened at last? what happened on What Happened to Us what happened then Dear,what happened to what happened to she