Relier Pairs 24/7 Listening Vocabulary MatchVersion en ligne Test your knowledge of key concepts related to 24/7 listening and communication. par ngô nhi 1 extinct (adj) 2 palaeontology (n) 3 professor (n) 4 immediately (adv) 5 ecology (n) 6 ancestor (n) 7 compulsory (adj) a university teacher of the highest rank without delay a person in your family who lived a long time ago the study of the relation of plants and living creatures to each other and to their environment no longer in existence the study of fossils as a way of getting information about the history of life on Earth that must be done because of a law or a rule