Did, Had, Were

Fill in the blanks with did, had, was or were.

1............... you see him yesterday?

2............... we better not tell them what had happened?

3............... you sleeping when I called?

4............... she here in the morning?

5............... you know the answer?

6............... I known that you were in trouble, I would have helped.

7............... I rich, I would travel the world.

8............... they waiting for you?

9What ............... you doing in my room?

10I ............... see anybody.

11The room looked nice. It ............... been cleaned.

12............... you hear the doorbell?