Ответ:1. Who wants to be a doctor?
2. Does He want to be a doctor or a teacher?
3. Your friend wants to be a doctor, doesn't he?
4. Does your friend want to be a doctor?
5. Why does he want to be a doctor?
Объяснение:
При построении вопросительных предложений в present simple окончание у глаголов 3 лица убирается ( Does Tom LIKE sandwiches? ) при построении отрицательных предложений ( Tom doesn't LIKE sandwiches ) , а при построении утвердительных предложений окончание -s/es прибавляется у 3 лица ( she, he, it) Tom likeS sandwiches, Sally watchES TV every day.