1.The boys' homes.
2.The horses' legs.
3.The girls' laughter.
4.The birds' wings.
5.The men's shouts.
6.The pupils' voices.
7.The children's cries.
8.The boys' shouts.
9.The women's songs.
10.The ladies' servants.
11.The dogs' barks.
12.My brothers' friend.