Mohammad Yani Pehang, Darmanto Minggele and 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), pp. 1–16. Available at: http://linguanusa.com/index.php/1/article/view/67 (Accessed: 19 December 2024).