1 ................... have you give up smoking ? for about two years
2.................... place is more densely populated - ha noi or ho chi minh city
3 .................... broken jane's favorite vase ? her brother did it
4..................... does mr. Brown do? he's a reseacher
5..................... ethnic groups are there in your country
6 .................... is your english teacher look like ? she young and pretty
7.....................water should we drink every day
8 .................... did you use to go school? i used to go on foot
9 .................... is it from here to the nearest police station
10 ....................songs is this singer performing ? he is perorming trinh cong son's songs