Here are the answers:
1. We played football in the park yesterday. (play)
*Explanation:* The Past Simple form of 'play' is 'played'.
2. Did you tidy up your room yesterday? (you / tidy)
*Explanation:* To form a question in the Past Simple, we use 'did' + subject + base form of the verb. The Past Simple form of 'tidy' is 'tidy'.
3. Linda and Paul did not enjoy the film at all. It was really boring! (not/ enjoy)
*Explanation:* To form a negative sentence in the Past Simple, we use 'did not' + base form of the verb. 'Did not enjoy' can also be written as 'didn't enjoy'.
4. Did Kate study yesterday afternoon? (Kate/ study)
*Explanation:* To form a question in the Past Simple, we use 'did' + subject + base form of the verb.
5. The Browns travelled to Rome last year. (travel)
*Explanation:* The Past Simple form of 'travel' is 'travelled'.