Помогите сделать отрицательное и вопросительные предложение. 1.Builders build the houses. 2. Choosing your future profession is a difficult choice. 3. The student works on this project. Заранее спасибо.

1.Builders don't build the houses. What do builders build? 2.Choosing your future profession isn't a difficult choice. What choice is difficult? 3.The student doesn't work on this project. Who works on this project?