Nên tag từ trên bài viết đầu chứ làm như thế có bị spam không? :v
1/ Three main types of educational institutions are primary (elementary) schools, secondary schools and universities.
Hoặc trả lời luôn They are primary (elementary) schools, secondary schools and universities.
2/ No, they don't.
3/ They study reading, writing, the English language, English literature, English history, geography, science, nature study, drawing, painting, singing, woodwork and drill (physical training).
4/ Yes, they are.
5/ Pupils have holidays at Christmas, Easter and in summer.