2022. The Effect of Multiple-Slot Substitution Drill on Students’ Grammar Mastery at the Eighth Grade Students of SMP Islam Al Akbar Malang. English Teaching Journal and Research: Journal of English Education, Literature, And Linguistics. 2, 2 (Dec. 2022), 213–233. DOI:https://doi.org/10.55148/etjar.v2i2.403.