bardzo duzo slow brakuje w zdaniach.
Holiday is a great time when we can Take (brakuje cos) Rest and regenerate (brakuje cos) energy after hard work 'for' (zle slow - poszukaj inne) (brakuje cos) year.
They go shopping, 'visit some monument' (nie, nie tak, napisz 'do some sightseeing) . If they are on (brakuje cos) Holiday at the seaside they spend all day on the beach. They sunbathE and swim in the sea. If they spend (brakuje cos) holiday in the mountains they (brakuje cos) hiking. I spent two weeks of my holiday in 'Spain in barcelona' (alez przeciez Spain nie jest w Barcelonie, ale Barcelona w Spain - popraw).
I think that it was the best holiday 'in' (lepiej OF) my life. Not everyone 'go' (tutaj GOES-3os.l.poj) on holiday.
In my opinion holiday TIME is the best time of the year because we can take (brakuje cos) rest and do what we want.