Question

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Answer 1

2. We weren't in the park last Sunday. We were in the museum last Sunday.
3. It wasn't cold yesterday. It was warm yesterday. 
4. It wasn't warm last autumn. It was cold last autumn. 

Answer 2

2 We weren't in the park last Sunday. We were in the museum
3 It wasn't cold yesterday. It was sunny
4 It wasn't warm last autumm. It was rainy