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Ответ:

1. Ann had a problem at school last week. Ann didn't have a problem at school last week.  Did Ann have a problem at school last week?

2. The next day her mother took her to the dentist. Her mother didn't take her to the dentist. Did her mother take her to the dentist?

3.  The dentist looked Ann's teeth and saw a bad one. The dentist didn't look Ann's teeth and didn't see a bad one. Did the dentist look Ann's teeth and see a bad one?

4.  He took the bad tooth out. He didn't take the bad tooth out. Did he take the bad tooth out?

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