People often ask the specialist on fishes regarding its _______.单选A. size B. life span C. age D. varietyThe specialist is embarrassed by the question because _______.单选A.he does not know the answerB.there is no answer to the questionC.it is a silly and simple question for himD.there is no definite answer to this questionWe can know a fish’s age from its ______.单选A. weight B. size C. scales D. lengthWhich of the following statements is NOT true?单选A.Different kinds of fishes have different life spans.B.It is hard for the specialist to know the length of time a fish lives in its natural stateC.Mature fishes grow more quickly than young ones.D.The specialist makes marking to know the rate of growth of fishes so that they know the age of the largest ones.Human beings, unlike fishes, _______.单选A.stop growing when they reach maturityB.grow faster after maturingC.continue to grow as long as they liveD.have a short life span