viết lại câu sao cho nghĩa ko đổi
1,the girl worked hard but her stepmother wasn't happy 
athough...
2,never talk with food in your mouth 
you shouldn't ...
3,you won't get in if you don't have reserved seats
unless you...
4,traditional dances are not as difficult as modern ones 
modern dances
5,nga srarted learning English 3 years ago
nga has...