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.