1B. The trees which have leaves are short.
2A. A bottle which is big is full.
B. The bottles which are small are empty.
3A. A girl who has short hair is called Melissa.
B. The girls whose hair is long ,are called Lucy, Tina and Debbie.
4A. A boy who is holding a black basketball is wearing school uniform.
B. Boys whose basketballs are white are wearing tracksuits.