Ex1:
1.at
2.next to
3.and
4.bed
5.a
6.To
7.How many
8.on
9.watch
10.goes
Ex2:
1.on
2.between
3.on
4.under
5.on/of
6.to
7.in
Ex3:
1.There is a bookshelf in my bedroom.
2.We have a sink, a fridge, a cooker and a cupboard in our kitchen.
3.I like the living room the best in the house.
4.The microwave is behind the dog.
5.There is a notebook on the table.