Past Perfect: "wish / if only" for Past Regret (B2)

I wish I ___ harder for the exam.

If only she ___ the truth earlier.

He wishes he ___ the job offer when he had the chance.

I wish I ___ goodbye properly before he moved away.

If only we ___ a taxi instead of walking in the rain.

She wishes she ___ that comment at the meeting.

If only I ___ the warning signs sooner.

I wish I ___ him my number — he has called every day since.

He wishes he ___ the project he started at university.

If only my parents ___ Spanish to me as a child.

I wish I ___ my passport at home — we missed the flight.

If only the band ___ another song before leaving the stage.

Mary wishes she ___ the email so late at night.

If only they ___ us about the change in advance.

I wish I ___ what I do now back then — so many things would be different.