From Paul Brians’ highly useful book Common Errors in English Usage, here is a worksheet on the pronouns him, her, he, and she. This is a full-page worksheet with a reading of a carefully explanatory paragraph and ten modified cloze exercises. Essentially, this is a worksheet on pronouns and case, dealing with the nominative and objective cases, but not the possessive, in English pronoun declension.
If you find typos in this document, I would appreciate a notification. And, as always, if you find this material useful in your practice, I would be grateful to hear what you think of it. I seek your peer review.