Prétérit ou present perfect?

My uncle ______________________________ (go) on a trip to Egypt three years ago.

Roy just ______________________________ (finish) repairing the washing-machine,you can use it now.

His worst memory: when he ______________________________ (have) to swim in the North Sea.

When I was a child I ______________________________ (believe) in ghosts.

Last year, we ______________________________ (visit) the British Museum.

What is the most frightening experience you ______________________________ (have) ?

Many students in my class already ______________________________ (travel) abroad.

Since yesterday he ______________________________ (spend) a lot of money.

She ______________________________ (always / be) my best friend.

I ______________________________ (steal-never) anything in my life.