Relacionar Columnas DO YOU KNOW? cz.5Versión en línea Find answers to the questions by clicking the right boxes. por Monika Wójcik 1 When were plastic bottles first used for soft drinks? 2 How much water can an elephant's trunk hold? 3 When was the $ sign introduced? 4 Are camels born with humps? 5 Can whales swim backwards? 6 Do horses and giraffes sleep standing up? 7 When was the tea bag invented? 8 How many colours can crocodiles distinct? 9 When was the first English dictionary written? 10 Which animals are the only mammals that can fly? in 1970 in 1755 in 1788 bats No None. They are colour blind. No in 1908 over 5 litres Yes