A dolphin (海豚) is always well-known as a clever and friendly animal.Recently another amazing(令人惊奇的) discovery made by the British marine (海洋的) biologist (生物学家)Alexis shows that dolphins, to our surprise, keep in touch with each other bycalling each other's names among themselves something like human beings. Alexis recorded over1700 different kinds of dolphins' calls and made a carefulanalysis of them.The analysis shows each dolphin has his own sound signalreferringspecially to himself and used all the time when he gets in touch with others. What's more,onedolphin iseven able to imitate another's cry in more orless the same way as sometimes human beings do while talking with birds, which is believedto be an important step towards languagefrom animals' calls.1).The main idea of the text is a new discovery about the dolphin.()A.TB.F2).A dolphin is like a human being by speaking in a certain language.()A.TB.F3). Alexis's new discovery about dolphins is that they are famous.()A.TB.F4). Adolphin is able to talk with birds !()A.TB.F5).Imagining ohers cies is thought to be a step tom animals Cal tlangage.()A.TB.F