1. The telephone was invented by Bell in 1876.
2. I asked Nga if she had many friends.
3. The man who is standing near the window is Nam's father.
4. Susan said that her sister would come to see her the following week.
5. It is difficult to understand this question.
6. Would you mind if I saw your new school bag?

1. Last summer, I went to Thailand with my father on his business trip.
2. We left Tan Son Nhat airport at 6am on June 12, 2004.
3. We are lucky to have enough time for a sightseeing tour.
4. Through this sightseeing tour, I saw and learned many wonderful things.

Part 1 : 

1. The telephone was invented in 1786

2. I asked Nga if she had many friends 

3. The man standing near the window is Nam's father

4. Susan said that her sister would come to see her the next week

5. It is such a difficult question to understand

6. Would you mind if I saw your new school bag ?

Part 2:

1, Last summer , I went to Thailand with my father on his business trip

2, We left the Tan Son Nhat airport on 12th June , 2004 at 6am

3, We are lucky to have enough time to go on a sightseeing tour

4, Through this sightseeing tour, I saw and learned many wonderful things