Помогите поставить артикль там где необходимо: This is...picture of my room.

Помогите поставить артикль там где нужно: This is...picture of my room. There is...large window in my...room. ...ceiling is white,...floor is brown,...walls are blue. There is...writing-table near...window and...chair near it. You can see...telephone on...writing -table. I often speak on...telephone. There is...bookcase to...right of...writing -table. There are not many books in...bookcase, but there are...lot of...magazines in it. I usually spend...lot of time in my...room. My sister lives in...Kharkiv. She is...doctor. She works at...hospital. ...hospital is...new and...modern building. ...hospital is near my sister's...house.My sister has got...family. She has got...husband and...son. Her husband is...teacher. He works at...school. My sister's son is...pupil. He is...pupil of...second form. He goes to...school every day but...Sunday.