1. What's wrong? You look ............

undo

unable

unhappy

unfit

2. I ............ my suitcase as soon as I arrived.

unpaid

unpacked

unadvanced

unbeaten

3. Some people think it's ............ to break a mirror.

unless

unlucky

uncertain

unfair

4. She didn't believe him, she thought his story was ............

untrue

unkind

uncut

unreliable

5. See a doctor if you feel ............

undo

untie

unwell

unhappy

6. It's ............ to eat so much candy.

unclear

unhealthy

unlikely

unable