Choose the correct tense.

[email protected] в категроии Английский язык, вопрос открыт 17.02.2018 в 01:15

1) I’ve never been/ I didn’t go in hospital before.
2) I have left/left school when I was16.
3) I already visited/have already visited a foreign country.
4) I finished/haven’t finished my university studies yet.
5) I’ve known/I knew my best friend for the last ten years.
6) I’ve never been/I never went on a plane.