Odpowiedź:
1. people used to write on a piece of paper and then fold it, since envelopes haven't been invented yet.
2. the cost depended on the distance the letter had to travel.
3. hill invented the penny black stamp in 1837
4. the penny black didn't show the country of origin since it was the first ever stamp to exist.
5. the penny black was used for a year.
Wyjaśnienie:
