0Sorry, I'm not going to really answer your question, but I think that, with "ago", you don't use the present perfect... It should be a simple past. This being said, I would use neither 1.
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01cite10Goodman12cite10 10In my opinion, I think there is a slight difference. 12br
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10I turned in my paper 11b11u10a few days ago10 12u12b10–10 10not sure when , perhaps 3-4 days ago12br
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10I turned in my paper 11b11u10
01cite10Teo12cite11blockquote11cite20Goodman22cite22br
20 20In my opinion, I think there is a slight difference. 22br
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20I turned in my paper 21b21u20a few days ago20 22u22b20–20 20not sure when , perhaps 3-4 day