1. We didn't spend our summer holiday in Da Lat last year.
2.Does Nam have less stamps than Viet ?
3.Chi usually spends 2 hours doing her homework every evening.
1. We not spent our summer holiday in Da Lat last year -> didn't spend
2. Does Nam have has less stamps than Viet? -> have fewer
3. Chi usually spends 2 hours to do her homework every evening -> doing
Câu 2 mình bị nhầm : Does Nam have fewer stamps than Viet ?
Câu 3 sai từ homewwork sửa thành
--> Chi usually spends 2 hour to do hẻ homework every evening.