Past Simple vs Past Perfect

Bryan .................... (to leave) his project in class the other day.

My friends gave me a ticket for a ballet "Swan Lake". I ......... never ........... (to be) to  the Bolshoy Teartre before and I ...... (to be) really happy to see this famous ballet to Tchaikovsky's music in this famous opera house.

The night ............ (to bring) with it a welcome cool, and Sarah was surprised to find the park deserted.

......................... (Dad / go) there before we went all together?

Last year I ......................  (pass) all his exams.

 If it ................. (not/rain) yesterday, we would have finished painting the fence.

He ...........never before ....... (to see) or imagined an old woman  with cosmetics on her face.

The virus ............. (mutate) again by that time, when the vaccines appeared

The past never ............ ( to be) altered.

When I ....... (get) to the airport I  ................ (discover) I ................... (forget) my passport.

Mom ......... (to know) my daddy for three years when they ......... (to get) married.

After arriving home, I ........ (realise) I ........... (to buy) any salt.

Mom was very pleased to see that my little brother .......... (clean) kitchen.

I opened my handbag to find that I .......... (forget) my credit card.

I went to the library, then I went to the dairy store where I ................ (buy) some milk  and went home.