Who __ the telephone It ___ by Amy .A was invented was invented B invent

问题描述:

Who __ the telephone It ___ by Amy .A was invented was invented B invent
Who __ the telephone It ___ by Amy .A was invented was invented B invented was invented

选B,第一个who做主语,用主动,invented是过去式.第二个空,it主语,用被动,用was.invent:发明(动词)