We could not hear the teacher clearly用as改

We could not hear the teacher clearly用as改 we can not hear you there was a river in the cave so we could hear the sound of running water a()we could not always see it It was noisy outside用so改 we could not hear接上面 the teacher 用so 改 we listen but could hear nothing.could可以去掉吗 We will sit near the front so we can hear the speaker better.He sat in the dark so that he could not be seen I could not hear the actors为什么用could不用did?为什么不用did not Every night we hear strange noises outside I think it ____ be teenagers having fun ,though I'M not sureA.must Bshould C.will D.could Every night we hear strange noises outside.I think it___be teenagers having fun ,but i am not sureA.should B.could We-----but could------nothing.A.listen;hear B.listened;heard C.listen;heard D.listened;hear 句型转换（改成被动）Change the VoiceIt was very noisy.We could not hear her answer the question.Change the Voice是改变语态的意思要改的是剩下的部分最想知道的是We could not hear her answer the question.怎么改成被 When you believe]Many nights we hav eprayed.With no proof anyone could hear.In our hearts a hopeful song.We barely understood.Now we are not afraid.Al I could not hear the actors为什么用could不用did? 同义句转换we can not hear anything. we could not move them 和we could not be moving them 区别 We moved to the front row ___ we could hear and see better. When we heard that,we could not s（）laughing Could the writer hear the actors or not?怎么回答这个问句比较合理?Could the writer hear the actors or not?怎么回答这个问句比较合理?