Вкаких случаях писать don*t а в каких doesn*t ?

1) does she work in an office or in a hospital? 2) why does he like to play with planes? 3) when does your father go to his office?

some children like school.because you can make new friends.have new friends.get good marks.and in school you can be more smarter! but some с hildren dont like school because they dont like to do a lot of homework,have 6 lessons.school is good! you have a lot of fun! have parties! i think school is good!