These exercises will help you practice using pronouns in the accusative case. In addition to the personal pronouns, you will need to use relative pronouns, possessive pronouns, and reflexive pronouns.
Remember that accusative personal and reflexive pronouns are the same, except for in the third person, where the reflexive pronoun for all genders and numbers is sich.
Possessive pronoun endings follow the endings used for ein, and accusative relative pronouns are the same as accusative definite articles.