Составить все типы вопросов к предложениям: 1) suddenly the door opened. 2) the children were having brekfast

What opened? what did the door do?
who was having breakfast? what were the children doing?

1. Did the door suddenly open?
2. Did the door or the window suddenly open?
3. How did the door open?
4. Suddenly the door opened, didn't it?

1. Were the children having breakfast?
2. Who was having breakfast?
3. The children were having breakfast, weren't they?
4. Were the children having breakfast or dinner?
5. Which type of meal were the children having?