----- Nội dung dịch tự động từ ảnh -----
4. Most VietNamese return home for Tet běcause it is the most important festival in Viet nam. (so)
->
5. It's not necessary to book a hotel In advance. (have to)
→You.
6. In my family, all of the children are obliged to get up before 6 a.m. and do exercises. (have to)
-> In my family,