Va rog sa ma ajutati dau coroana va rog frumos!!!!!

1. Monica's sister?
2. the teacher's books?
3. Lucy and Martin's sister.
4. the students's english teacher.
5. Simon's pencil case?
6. Adam's surname :)
Are you Monica's sister?
Are they the tracher's books?
I am Lucy and Martin's sister.
Mr Davy is the students Eng teacher.
Is this Simon's pencil case?
Adam.s surname is Davis