Rewrite the sentences using unless.

If you don’t study, you will fail your exam.
I’ll make dinner if nobody wants to.
If you don’t stop smoking, you will feel bad.
We will eat at that restaurant if they’re not closed on a Monday.

Примерно как-то так:

1.     Unless you study, you will fail your exam.

2.     I’ll make dinner unless nobody wants to.

3.     Unless you stop smoking, you will feel bad.

4.     We will eat at that restaurant unless they're closed on a Monday.