1. .................... you stop smoking, you'll be seriously ill.

If

Unless

Unless not

If do

2. ................... they're late again, I'll be furious

If

Unless

Do

Unless not

3. ................... you don't save some money, you can't go on vacation.

Unless

If

Unless don't

When

4. If you don't save some money, you can't go on vacation. [ Use unless ]

Unless you don't save some money, you can't go on vacation

Unless you save some money, you can't go on vacation

Unless you can't go on vacation , you don't save money

Unless you doesn't save money, you can't go on vacation

5. You will lose your job ................... you work harder.

if

when

unless

that

6. .................. you stop making that noise, I'll call the police.

If

Unless

Do

Unless not