Mohammad Yani Pehang, Darmanto Minggele, & Hanif Cahyo Adi Kistoro. (2024). Improving Understanding And Learning Activities Of Simple Present Tense Declarative Sentences Through Whatsapp-Based Substitution Drills Techniques For Mtsn Students In Kupang City. Linguanusa : Social Humanities, Education and Linguistic, 2(3), 1–16. Retrieved from http://linguanusa.com/index.php/1/article/view/67