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