Grammar LV2 — Quiz — Day 1: Present Perfect Continuous

1 Complete: I ___ studying for two hours. (have)
2 Choose: She has lived here ___ 2020.
3 Choose: He has been working here ___ five years.
4 Rewrite to emphasize duration: 'I study English.' (I've studied for 3 years) -> 'I ___ English for three years.'
5 Which is correct?