Idiomsnominalinnaturehavea(n)______asthekeywordineachandfunctionasanouninsentences.
Youngerchildrenarecurious________howthingswork，andmanyofthemwanttotakeaparteverythingwithintheirreach.
analysis,criteria,diabetes,gentry,pants,physicsa.Singularonly:________________________________________b.Pluralonly:__________________________________________
The()Ageofthe1920scharacterizedbyfrivolityandcarelessnessisbroughtvividlytolifeinTheGreatGatsby.