11. She (to buy) a new dress yesterday? – No, she (not to buy) it. 12. They (to sell) their house a week ago? – I (not to know).
13. She (to be) ill now. She (to eat) an ice-cream yesterday.
14. When you (to leave) the office yesterday?
15. They (to be) happy to see you now?
11.Did she buy a new dress yesterday?
No, she didn't buy it.
12.Did they sell their house a week ago?
I don't know.
13.He is ill now. She ate an ice-cream yesterday.
14.When did you leave the office yesterday?
15.Were they happy to see you now?