Recordemos:
Do/Don't = They, We, You
Does/Doesn't = He, She, It
Ahora los ejercicios.
1.- Students don't work long hours
a) don't work
b) doesn't work
c)woks
2.- Mark and Peter don't study
a) doesn't
b) dosen't
c) don't
3.- The doctor lives in a big house
a)livess
b)lives
c)live
