Răspuns:
1)
A tooth-teeth
A deer-stags
An ox - oxen
A goose-goose
A chinese-chinese people
A fish-fish
A child - children
An offspring-descendants
A life-lifes
A hero - heroes
A milion-milion
A handkerchief-handkerchiefs
A hoof-hoof
A piano-pianos
A louse-head lice
A monkey - monkeys
A man-mans
A story-fairy tales
A watch - watches
A scarf-scarfs
2.
Circus-circuses
Dilemma-dilemmas
Bacterium - bacteria
Thesis-theses
Forum-forums
Matrix - matrice
Analysis-analysis
Idea - ideas
Criterion-criteria
Soprano-sopranos
Curriculum-curriculum
Oasis-oases
Alga-algae
Ameba-amoeba
Alumnus- alumnus
Appendix-appendices
