Jawaban:

Matching the expressions of apology and the situations:

1. Pardon? - I'm sorry. I can't understand what you are saying.

2. I'm so sorry. I didn't realize they were yours - Sorry, I think I've caught a cold.

3. I'm terribly sorry. Let me buy you another one - I'm sorry, but this isn't what I ordered.

4. Sorry to bother you again, but there's one more thing I don't understand - Excuse me, can you help me?

5. I'm sorry. I can't understand what you are saying - You're welcome.

6. You're welcome - I'm sorry, but this isn't what I ordered.

7. So, how do you like the new car? - I'm so sorry. I didn't realize they were yours.

8. So, are we still on for dinner tonight? - Sorry to bother you again, but there's one more thing I don't understand.

Note: The provided text at the end seems to be incomplete or unrelated to the matching exercise.