HomeEnglishHe has been working on and off for several years on this research project. 3478. He has been working on and off for several years on this research project.By Admin / September 16, 2025 A. at intervals B. continuously C. rarely D. painstakingly ✅ The correct answer is option A.
1. By the time you get this letter you _______ the tragic news. Leave a Comment / English, MCQs / By Admin