1. My shoes is under the chair -> are
2.This is you pen-> your
3.The book is in the table->on
4.Mary and Tom are on the room->in
5.His fathers is there->father
6.The clock is next the glass-> next to
7.Their mother is upstair->upstairs
8.The dog is behind the shelf - correct
9.Our teacher is in front of the blackboard -correct
@linhhuong