Here are the completed sentences with the correct verb forms, along with explanations: 1. This report was submitted by the intern now. (Incorrect phrasing. "Now" implies immediacy; "was submitted" implies a completed action in the past. A better phrasing would be: "This report has been submitted by the intern." or "This report was submitted by the intern.") 2. My favourite book has been translated into multiple languages recently. (The translation happened recently and is completed.) 3. The award was presented to the winner by the CEO last month. (The presentation happened in the past.) 4. Our package was delivered by the courier yesterday morning. (The delivery happened in the past.) 5. I think the concert was attended by thousands of fans. (The attendance happened in the past.) The key is to consider the tense and whether the action is completed or ongoing. The original sentences mixed tenses incorrectly