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