Unit 3 ReviewOnline version Choose the correct option to complete the sentences. Gold Advanced Coursebook p. 35 by Miss Lopez 1 Her ____ behaviour caused a lot of problems in the group. a mature b infantile c geriatric d childlike 2 His ____ good looks and great singing voice made him an immediate hit with teenagers. a childish b immature c boyish d adolescent 3 Europe's ____ population presents considerable problems for governments trying to find a way of cutting spending on healthcare and pensions. a aging b mature c adult d grown-up 4 They say that being happy is one of the keys to looking ____, even in late middle age. a adolescent b teenage c puerile d youthful 5 I am really tired of your ____ jokes. Grow up! a childlike b youghful c puerile d boyish 6 I think the really ____ way of going about this would be to sit down and discuss it calmly. a adult b againg c elderly d older