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The best way to correctly complete the sentences are:

  • Sue and Kelly are both hardworking students
  • Dana is a talkative and funny girl
  • He's a serious but friendly guy
  • She's a generous mother

From the given sentences, we can see that there is an error in each of the sentences.

The errors in the sentences were the omission of the article "a" which made the sentences complete.

Furthermore, the word "both" which compares Sue and Kelly was also omitted in the first sentence.

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https://brainly.com/question/12577890