1. I believe that she will pass the exam with flying colors.
2. I doubt that he will be able to finish the project on time.
3. I guess that they will choose the blue color for the logo.
4. I imagine that the sunset on the beach must be breathtaking.
5. I know that she is a reliable and trustworthy person.
6. I suppose that they will arrive at the party late.
7. I understand that it can be difficult to make a decision in such a short amount of time.