6. Nhung has never watched a 3D movie
5. Has Hong ever been to LongAn
7. Hoi has never stayed in a hotel
8. Hoang has never traveled by airplane
III.
5. Has Hong been to Long An
6. Has Nhung watched a 3D movie
7. Has Hoi stayed in a hotel
8. Has Hoang traveled by airplane?
IV
1. I have just come back in a vacation from Nha Trang
2. Quoc Tu Giam was the first university in VN
3. There are six continents in the world
4. The tower is the most famous in England
5. It looks like a new building but it's more than 100 years
