I.
1. sat
2. hasn't arrived
3. in order to
4. to connect
5. talking
6. whether
7. made
8. when
9. resort
10. learn
II.
1. Mai didn't go to school yesterday.
2. was watching
3. have seen
4. to buying
III.
1. Would you mind giving me that book?
2. He asked me if I went to Ha Noi.
3. Paper is recycle every year
IV.
1. Would you mind if I asked you some question?
2. It is dangerous to go near a fierce dog.
V.
(1) went
(2) postcards
(3) Pyramids
(4) took
(5) home
VI.
1. Dragon
2. Yes, they can
3. No, it isn't
4. Dau Go.....