Question

When I go to the club _____ my friends are partying, I never know what to _____.

1. were / where

2. where / wear

3. were / we’re

4. we’re / wear

Answer 1

heya folk

option 2 is correct

When I go to the club WHERE my friends are partying, I never know what to WEAR

Answer 2

When I go to the club where my friends are partying, I never know what to wear.

Therefore the answer is 2. where / wear

I hope it helps you ^_^