Complete the dialogue with the corresponding words.
Sleep, will have, will pass, would have known.
Agatha: Hi, Ben! You look tired. What`s wrong with you?
Ben: I am studying for my exam at the moment and stay up regularly. If I fail it, I ____ many problems.
Agatha: Oh, I see. But if you ___ little, you will ruin your health.
Ben: Well, if I had started earlier, I ____ all the material by now.
Agatha: Don`t worry. If you study properly, you ____ the exam. Good luck.
Ben: Thank you.