Choose the right words to complete the sentences.

Choose the correct option.

I missed the concert of my favourite band. That's a pity! I wish I [went|had gone] there!

Everyone thinks I'm 12 while I'm 14! I wish I [looked|had looked] more mature!

I can't help you, I'm too busy. If only I [had|had had] more free time!

I've got an exam tomorrow, and my head is empty. I wish I [studied|had studied] harder.