I had left it on a chair beside the door我想问 door前面为什么要加the 而

I had left it on a chair beside the door我想问 door前面为什么要加the 而 now 这里用法?I had left it on a chair beside the door and now it 一般过去式的问题I had left it on a chair beside the door adn now it I had left it on a chire beside the door and now it wasn't t The chair is beside the door.The chair is_____the door. The chair was beside the door.It was _______ it.a.near b.far when I locked the door,（）I realized i had left my key on the The chair was beside the door .It was __ it填near 还是next to?为 I had left it on the chair.That's where I _____it. i knocked on the door a few times but____answered,so i left. i had left it on the chair.that's where i put it.后半句的句型讲解和意思 The chair is_the floor_the door.