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