Yes, but... We're doing the very best we can, sir. Yes, yes, we have.
10 seconds sound clip from Superman (1948) - Depths Of The Earth (Chapter 2).
You can hear this line at 00:09:48.821 in the Blu-ray version of the episode.
Quote context
[...]
- I told you I wasn't to be disturbed under any... Oh, it's you, Lois.
- Yes, this is Lois Lane, demon reporter.
- But they won't let anyone inside the police lines.
- Yes, but... We're doing the very best we can, sir. Yes, yes, we have.
- All right, Mr. White. Uh, yes. Yes, sir. Goodbye.
- I can get that mine story. They won't keep me out.
- How did you know we were talking about a mine? I didn't mention it.
- My hearing is a little better than average.
- How about giving me a chance?
[...]