Once again, from Paul Brians’ book Common Errors in English Usage (to which he generously allows access at no cost at the Washington State University website, and which has now also become a podcast), here is a worksheet on differentiating the use of the adjectives impertinent and irrelevant in prose. This is a full-page document with a reading of two longish (both containing clauses separated by a semicolon) compound sentences and ten modified cloze exercises.
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.