tpo17听力第四篇lecture最后一道重听题
原文是Sotheoctopushastheabilitytomimicboththecolorandthetextureofitsenvironment,Andit'strulyamazinghowwellitcanblendinwithitssurrroundings.Youcaneasilyswimwithinafewfeetofanoctopusandneverseeit.
Whydoestheprofessorsaythis?(Youcaneasilyswimwithafewfeetofanoctopusandneverseeit)
选项是:B.Toillustrateapoint;C.Toproposeanexplanation
我的疑问是:为什么答案是B而不是C