1: What colour is ...the.. floor in your room?
2: Write ...a/the... question on ...the.. blackboard, please.
3: Please open ..the.. window.
4: Please close ..the.. door.
5: Are you writing ..- / the... new words?
6: Is he giving you ..a... piece of ..... chalk?
7: Where's ...the.. chalk?
8: Where's ..... Room Six?
9: ..The... exercise-book is on ...the.. table.