6、.Thenumberofclosedclasswordsisstableforever.(F)20.Theassimilationruleassimilatesonesoundtoanotherby“copying”afeatureofasequentialphoneme, thusmakingthetwophonessimilar.( T )21.Thepartofspeechofthecompoundisalwaysdeterminedbythepartofspeechofthesecondelement,withoutexception.(
7、 F )22.Aproductivemorphologicalrulecanbeappliedtoallwords.(F)23.Sometimesderivationcanapplymorethanonceanditispossibletocreatemultiplelevelsofwordstructure.(T)24.Bothinflectionalmorphemesandderivationalmorphemesareboundmorphemes.(T)25.Themeaningofacompoundcanbederivedfromthemean