2. I was delighted to learn that I had been promoted

3. It was stupid of him to press the emergency button

4. It's necessary to have interests outside

5. It was very generous of John to give them $100

6. They were astonished to see that the driver was a six-year-old boy

7. It was very kind of you to visit me in hospital

8. It's very important for athletes to be in good health

9. We're sorry to hear that your father's in hospital again

10. It was very rude of him to make that remark. 

Công thức : Be + adj + of / noun / pronoun + to - infinitive

`2.` I was delighted to learn that I had been promoted.

`3. `It was stupid of him to press the emergency button.

`4.` It's necessary to have interests outside.

`5. `It was very generous of John to give them $100.

`6. `They were astonished to see that the driver was a six-year-old boy.

`7.` It was very kind of you to visit me in hospital.

`8.` It's very important for athletes to be in good health.

`9. `We're sorry to hear that your father's in hospital again.

`10.` It was very rude of him to make that remark. 

- It + be + adjective + of + noun/pronoun + to-infinitive