1. It is possible traveling to Da Nang by train? => to travel

2. In spite of the weather was bad, we had a good time.=>Despite

3. Although we had plan every thing carefully, all lot of things went wrong.=>planned

4. The Carnival of Rio de Janeiro is a very fascinated festival. =>fascinating

5. There are a lot of culture and artist activities held as part of this festival. =>cultural

6. Tet holiday is the most important celebration to Vietnamese people. => for

7. Tomorrow afternoon we will be played tennis from 3 o'clock to 4.30. =>until

8. On 7p.m tonight I will be eating dinner with my close friends. =>At

9. Waves will be used as an environment friendly source of energy. =>environmentally

10. Will people traveling in driverless and high-speed cars in the future? =>travelled 

11. My school bag is green and her is pink.=> hers

1. traveling => to travel

2. In spite of => Although/ Even though/ Though

3. plan => planned

4. fascinated => fascinating

5. culture => cultural

6. to => for

7. will be played => will play

8. On => At

9. environment => environmentally

10. Will people traveling => Will people be traveling 

11. her => hers