Your picture is not quite finished. Regardless of the test, you will pass the course. The word is a double negative. The walls in this room are stationary. Stationery is paper that you write on.
Mother writes on purple stationery.
John is taller than his sister. Then is an adverb or conjunction indicating at that time or next. First we ate lunch, then we went to school. The coat that belongs to Sara is here. The book which you read is a classic.