一般过去式的问题I had left it on a chair beside the door adn now it

一般过去式的问题I had left it on a chair beside the door adn now it now 这里用法?I had left it on a chair beside the door and now it I had left it on a chire beside the door and now it wasn't t 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 the chair.that's where i put it.后半句的句型讲解和意思 I had left it on the chair.That's where I _____it. The chair was beside the door.It was _______ it.a.near b.far The chair was beside the door .It was __ it填near 还是next to?为 I left my pen on the desk and now it’s gone; who _____ it? The chair is beside the door.The chair is_____the door. -I left my miniradio on the desk just now,but now it’s gone, It is on the chair.的中文