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