문장에서 it의 쓰임과 같은 걸 찾는 건데요..

it is the age of the computer. - it과 쓰임이 같은 것.

1. now tell me that you know about it.
2. it can help scientists work out problems.
3. it is always pleasant to have a match.
4. it is his first day.
5. it is not easy to break a bad habit.

아리송해서요.. 부탁드립니다!