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