1. It was nice of you to give me the last other cake

2. It was eye-opening to learn about the old transport system in Hanoi

3. It is very hard to remember all the Maths formula for the tests

4. It is hard to know exactly when HCMC's metro will open

5. It is impossible to do this project in 24 hours

6. It is important to take a break twice a day

7. It is possible to work on your own project

8. It is exciting to be here

9. It is difficult to guess what will happen 30 years from now.

10. In this busy world, it is such a pity that parents and children don't have much quality time for each other.

2. 

1. She is certain that her son will be accepted to a high school for the gifted

2. My father is upset that my brother wants to drop out of high school

3. He is amazed that his colleagues celebrate his birthday in a fun way

4. She was worried that her father's surgery would be unsuccessful

5. We were relieved that the rain had finally stopped

6. They are very eager that Hanoians can soon travel on the sky-train

7. Michelle is aware that her puppy has been acting strange lately

8. He is confident that his short story will win the first place in the writing competition

9. Everyone is pleased that the weather for Tet turns out to be so nice.

10. I am amazed that Vietnam has so many magnificient natural wonders