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