singular artinya satu, dan plural artinya lebih dari satu.

kata singular tidak menambahkan huruf "s", sedangkan kata plural menambahkan huruf "s".

jawab :

1. plural : paws are to cats, as feet are to human

singular : paw is to cat, as foot is to human

2. plural : keys are to doors, as passwords are to computer

singular : key is to door, as password is to computer

3. plural : girls are to boys, as women are to men

singular : girl is to boy, as woman is to man

4. plural : geese are to flocks, as dogs are to packs

singular : goose is to flock, as dog is to pack