Inserire la parola WHOSE se necessario, quando non è necessario scrivi NULL:
1 Marsupial are animals .... young are carried in a pounch. -- 2 David Attenborough is a naturalist ... films have been seen all over the world. -- 3 An ornithologist .... is a person who studies birds. -- 4 Mammals are animals ... babies are born fully-formed rather than in eggs. -- 5 Crocodiles and lizards .... are related to the dinosaurs, which lived millions of years ago. -- 6 Another person ... work has become well known is Roger Fouts. -- 7 Fouts, who has studies the behaviour of other animals, taught .... chimpanzee sign-language. -- 8 The chimpanzee, .... name was Washoe, learned about 160 signs. -- 9 Whales and dolphins both make sounds which in some ways .... are similar to a language. -- 10 .... boyfriend is this?
