SBT tiếng anh trang 29
6. Put the words in the exercise 1 in the correct column of /s/, /z/, /-iz/ according to the pronuncaition of the final endings
/s/ /z/ /-iz/
colcks doors couches
............. ............. .............
............. ............. .............
............. ............. .............
............. ............. .............
colcks doors couches
/s/ /z/ /-iz/
Là sao mình ko hiểu