Chuyển các câu khẳng định sang câu phủ định và nghi vấn:
1. Peter went to the supermarket a few minutes ago.
2. They puplished "Easy 5" three months ago.
3. His parents travelled to Hong Kong last year.
4. Daisy was very happy when she scored high marks in the final exam.
5. They were excited about the film last night.