5. Write the plural of the following nouns:

A teacher _______________
A man ______________
A tooth _________________
A louse ______________
A life __________
A potato ________________
A city _________________
An analysis ____________
A mosquito _____________
A deer _________________
A sister-in-law ___________
A myth _________________
A key _________________
A glass _________________
A bush ________________
A tariff _________________
A story _______________
A watch _____________
A zoo _________________
An echo_________________
A grown-up ______________
A scarf ________________
A box ________________
An knife ____________
A fox _________________
A mouse ______________
A roof _________________
A postman ______________
A forget-me-not __________
A factory ________________
A day _________________
A studio ________________
An ox _________________
A thief _________________
A hero _________________
A prize _________________
A foot _________________
A kiss _________________
A donkey ________________
A loaf _________________
A stimulus _______________
A curriculum _____________
A brush _________________
A wife _________________
A guest _________________
A tomato ________________
A wreath ________________
An employee ____________