Present Perfect VS Past Simple

The Titanic ____ (sink) in 1912.

Somebody ____ (steal) my bicycle! Now, I'll have to walk home.

I ____ (see) the movie Titanic three times. I'm going to see it again tonight.

When she was young, she ____ (live) in Seoul.

____ you ____ (forget) to study last night?

I ____ (lose) my key yesterday, so I couldn't get into the house.

His brother ____ (visit) London last year.

Jack ____ (live) in Boston for the past 15 years.

I ____ (not do) my homework yet.

Peter ____ (not go) to Paris last year.