1) Did Ann ask Mary a lot of questions at the lesson? (general question)
2) Who asked Mary a lot of questions at the lesson? (question to the subject)
3) What did Ann do at the lesson? (special question)
4) Did Ann ask Mary a lot of questions at the lesson or after school? (alternative question)
5) Ann asked Mary a lot of questions at the lesson, didn't she? (tag-question / disjunctive question)