Perfect tenses

I ...................................(not drink) goat's milk. I find the thought of it appalling.

I ...........................(not see) Dora in ages. She must have changed a lot!

I .........................(see) many of his movies, but I don't know why Johnny Depp is considered a good actor.

By this time next year, the whole Covid situation.......................(become) a strange memory.

By the time I'm 50, I......................(finish) paying my mortgage.

....................(see) George today? When I got home, he ........................(already/leave)!

By 2100, scientists ............................(invent) a way to make perfect human teeth without braces! (too bad I won't probably be around).

By 20th December, all the students in this English class ............................(graduate) the English course with flying colours.

When I hit 50, I ............................... (travel) through all Europe and Asia.