短语词组短語knock on the cage door 敲鳥籠的門;啄籠子的門;敲籠子的門a knock on the door 敲門聲Loud knock on the door 大聲敲門to knock on the door 打門Knock on the classroom door 敲教室的門knock on the neighbour 's door 敲 返回 knock on the door