1 Vietnamese people/life/be/significantly/improve/recent years
2Have/students/work/groups,/she/hope/they/learn/be/cooperative
3 It/reported/many/our man-made/wonder/be/damage
4 Classrooms/make/mud and straw/trenchs/all around/used/common/Vietnam/during/war
giúp em với ạ hoàn thiện thành câu hoàn chỉnh ạ