The Exercises in this booklet deal with errors that could be committed by students of the Hausa, Igbo and Yoruba languages of Nigeria, as well as the English language. It contains 20 varied exercises to test learners’ use of the languages; together with the answers to those exercises which are contained at the back of the book, for learners to verify the correctness of their own answers. This book, which can also be used as a workbook in schools, boosts understanding and skills in the areas of structuring sentences, changing tenses and choosing good words. The book also contains 200 vivid illustrations - each question is written alongside an illustration to aid the understanding of each one.