Make the right choice:
1. I have always dreamed of having (a million/millions of) dollars.
2. We have tried (a million/millions of) times to talk to her but in vain.
3. (a million/millions of) years people have been developing their best human qualities.
4. You can find (a million/millions of) books in our local library.
5. Little children ask for (a million/millions of) questions every minute.
6. (a million/millions of) years ago there was no civilization in this area.
7. (a million/millions of) young people make a try to become students.
8. There are (a million/millions of) books on this topic.