Last winter we visited my mum's cousins who/which live in moscow. i had never been to russia before and i was lookong forward to visit/visiting them. our trip was really exciting. i enjoyed to go/going sightseeing. we admired the kremlin and the tretyakov gallery in moscow. moscow is one of the best cities where/that you never get bored. the culture is thrilling and the people are nice.
2) visit
3) go
4) where