4. Ответь на вопросы, пользуясь подсказками. 1. Did your uncle work yesterday? (✔) - Yes,

Explanation: The question is in the simple past tense. The checkmark (✔) and the provided start of the answer 'Yes,' indicate a positive response. The rule for answering yes/no questions in the simple past is 'Yes, subject + did.' The subject is 'your uncle', which can be replaced by 'he' for the answer.

Answer: Yes, he did.