Поставьте следующие существительные во множественном числе:
a lamp,a coach,a slice,a party,a solo,a curriculum,an ox,a sheep,a mouse,a writer,a play, a foot, a theatre,a deer,a box,a trouble,a swine,a life,a part,a handkerchief.

a lamp-lamps,a coach-coaches,a slicslices,a party-parties,a solo-solos,a curriculum-curriculums,an ox-oxen,a sheep-sheep,a mouse-mice,a writer-writers,a play-plays, a foot-feet, a theatre-theatres,a deer-deer,a box-boxes,a trouble-troubles,a swine-swine,a life-lives,a part-parts,a handkerchief-handkerchiefs