When we go to travel (lepiej: TRAVELLING), we must remember about (bez: about, lepiej: TO TAKE) different things and we
>can't (SHOULDN'T) forget
>about advices (ADVICE - niepoliczalny rzeczownik, nie ma liczby mnogiej) whose (WHICH, whose to czyj) people give us. If you want to go on holiday(,) for
>example at
>the lake(,) and you will be sleep (YOU WILL SLEEP lub YOU WILL BE SLEEPING)in (A) tent, you should take (THE) necessary
>things.
>If you won't (DON@T WANT TO) get bitten by insects(,) you could (SHOULD) take insect repellent.
> (OTHER) Useful (THINGS)
>will be sunscreen, sunglasses and (A) first aid kit in case if to happen
>accident (IN CASE AN ACCIDENT HAPPENS).
>In travel (DURING TRAVELLING) (IT) is very important (TO HAVE) a passport or another (another to liczba pojedyncza, wiec lepiej: OTHER)documents because
>its help (IT HELPS) us
>to cross border.