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