Matching Pairs 24/7 Listening Vocabulary MatchOnline version Test your knowledge of key concepts related to 24/7 listening and communication. by ngô nhi 1 ancestor (n) 2 ecology (n) 3 palaeontology (n) 4 extinct (adj) 5 immediately (adv) 6 professor (n) 7 compulsory (adj) the study of fossils as a way of getting information about the history of life on Earth no longer in existence without delay that must be done because of a law or a rule a university teacher of the highest rank 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