1. They didn't sleep in the afternoon yesterday. Did they sleep in the afternoon yesterday?
2. The students didn't understand the English text. Did the students understand the English text?
3. You didn't read the newspaper in the library 2 days ago. Did you read the newspaper in the library 2 days ago.
4. We didn't learn geography last year. Did we learn geography last year?
5. He didn't wear a warm coat in autumn. Did he wear a warm coat in autumn?