2 A: What ........ (you/have) for breakfast yesterday? B: A glass of milk and cereal.

A: What did you have for breakfast yesterday? B: A glass of milk and cereal. **Translation:** A: Что ты ел на завтрак вчера? B: Стакан молока и каша. **Explanation:** In the first question, we need to form a past simple question using "you/have". The correct past simple form of "have" is "did have". Therefore, the question is "What did you have...?".