3) They are our parents' friends.
That is a room for children.
It is my little sister's doll.
This is Kate's dress.
4) seven - seventh
fourteen - fourteenth
twenty-eight - twenty-eighth
thirty-eight - thirty-eighth
fourty-nine - fourty-nineth
fifty-two - fifty-second
sixty-seven - sixty-seventh
seventy-four - seventy-fourth
eighty-one - eighty-first
ninety-nine - ninety-nineth
one hundred - one hundredth
5. beds, women, triangles, cylinders, husbands, lines, pupils, feet, geese, copybooks