Answer:
The correct answers are:
1. When you finish the report, you can give it to Line or me. "Me" is used here because it is an objective pronoun.
2. The report isn't for me; it's for Dr. Robinson. "Me" is used in this sentence because it is an objective pronoun.
3. I would prefer a verbal report. "I" is required in this sentence because it is present before the verb.
4. My colleagues and I want to thank everyone who made this project a success. In this case, "I" is required because someone else is mentioned too.
5. Andrew gave more of the credit for the sale to me than is warranted. "Me" is used in this sentence because it is an objective pronoun.