听力原文：Man: When did you last go to London？
Woman: Oh, I don't know really. I suppose it was about thirty, or maybe even forty years ago.
Man: As long as that？ You wouldn't recognize it now.
Woman: Has it changed very much？
Man: Oh, yes! It's changed beyond belief. It's a lot bigger of course and it's been cleaned up quite a lot.
Woman: What about the fog？
Man: Oh, London doesn't have fog any more. That's all disappeared and the air has been cleaned considerably over the last thirty years or so.
Woman: Do you think I'd still recognize it？
Man: Of course you would. Parts of London haven't changed very much at all, but in other areas the change is incredible.
Woman: Is that cinema still open, the one at the comer of the street where I used to live？ You remember it, the "Rex", I think.
Man: No, that was knocked down about ten years ago. It's been replaced by a large supermarket. The small park has been destroyed, too, and the road has been widened.
Woman: What a pity! That park used to be very beautiful, and peaceful, too, in the summer.
Man: Even the old grocery shop isn't there any more. It's been turned into a small restaurant.
Woman: Is the mall still there who used to deliver coal？
Man: No, unfortunately, he died five years ago, but his son still runs the business. He's doing very well with the business.
Woman: Well, that's progress! You know, I don't think I'd like to go back to London somehow.
Man: I go to London more often now than I used to, so I don't notice the changes now.
Woman: I think it's been changed too much. I want to remember it as it was.
(20)

A. It's bigger.
B. It's cleaner.
C. It doesn't have fog any more.
D. It's more industrialized.