Choose the letter A, B, C or D to complete the passage below

My bedroom is ___________ (6) the second floor. It is not exactly a large room ___________ (7) it is spacious enough to become my private world. ___________ (8) is a fully-furnished room with a single bed on the left and a wardrobe on the right corner. And there is ___________ (9) wood table with a shelf that contains many interesting books and is decorated with lots of souvenirs and birthday gifts. With two small windows on the two sides of the room, I use bright color tone for the wall ___________ (10) my bedroom airier and warmer. My bedroom- a small room but unintentionally becomes a vital piece in my whole life.

(6)....................

• A. 
  at
• B. 
  on
• C. 
  to
• D. 
  of