9.The house is Tom’s. Its door faces south.
10.The house is Tom’s. The door of the house faces south.
11.Workers built shelters for the survivors. Their homes had been destroyed.
12.Workers built shelters for the survivors. The homes of them had been destroyed.
13.Tom has a gold watch. Its hands are made of diamond.
14.He has two sons, and both of them are teachers.
16.There is a beautiful house, and in front of it sits a little girl.
18.We have no money. We buy food with money.
22.I will never forget the day. I spent it with you last summer.
23.I will never forget the day, and on that day I joined the army.