The noise can be heard by me.
The airport may be built by them next year.
The airport can be used by people soon.
The house will be knocked down by a plane.
刚才以最快速度解决了,不过看你没有采纳,证明还不是很急,那就顺便普及一下,其实被动语态变化很好做,你认真看看就会发现他们的共通点,就是都变成can be/should be+done(动词过去分词),而can与should是情态动词需提取,而如果直接是动词则直接是be done 即可.至于详细的要怎么变,可能要熟记一些常见的变化了.
希望你下次自己做,不用问了.