/s/ books , parents, students , baskets, lamps, desks,
/z/ boards , telephones, engineers, doors, erasers, armchairs, tables, teachers, years, windows
còn lại là /iz/
/s/: parents, lamps, students, books,desks, baskets
/z/: armchairs, boards, tables, engineers, teachers, years, telephones, doors, erasers, windows
/iz/: classes, benches, couches, bookcases
books parents students baskets lamps desks
boards telephones engineers doors armchairs erasers windows tables
còn lại
Các âm /s/: books , parents, students , baskets, lamps, desks,
Các âm /z/: boards , telephones, engineers, doors, erasers, armchairs, tables, teachers, years, windows
Các âm /iz/ : classes , benches , couches , bookcases
S/book ,parents,students,baskets,lamps,desks
Z/boards,telephones,engineers,doors,erasers,armchairs,table,teachers,years,windows
Còn lại/iz/