Biến các câu sau thành câu sử dụng used to hoặc didn't used to:
- My father was a football player.
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- Mary didn't do her housework went she was a child.
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- Lucy often play the video games with her best friend but now she didn't.
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- Nam didn't drink soda when he was a student.
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- In the corner of the room was had a lot of dust.
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