Doan, V.K. 2025. Using Shadowing Technique to Improve English-Majored Sophomores’ English Speaking Skills at Hanoi University of Natural Resources and Environment. Journal of Knowledge Learning and Science Technology ISSN: 2959-6386 (online). 4, 3 (Aug. 2025), 55–71. DOI:https://doi.org/10.60087/jklst.vol4.n3.005.