A、They came from the original wing. B、They’re made of the same material. C、They’re similar in shape. D、They were designed by the

M: Hey, How was your trip?
W: It is wonderful! I spent most of my time at the art museum. I especially liked the new wing. I was amazed to hear the guide explain the problems they had when building it.
M: Right. I just read an article that went on and on about the cost: 90 million total, I think.
W: Yeah, the guide mentioned that. You could see they spared no expense.
M: Hm. It looked really unusual, at least from what I saw in the picture.
W: It is! The basic design is two triangles. In fact there are triangles all over. The paving stones in the courtyard, the skylights and even a lot of sculptures. One sculpture is a mobile. It is in the courtyard and it’s made of pieces of aluminum that move slowly in the air; It’s really impressive.
M: That was mentioned in the article, too. It said that the original was steel and it weighed so much that it wasn’t safe to hang.
W: Right. They did it over in aluminum so it wouldn’t come crashing down on someone’s head.
M: You know the article went into that in detail. There was even an interview with the sculptor.
W: I’d like to read that. Would you mind if I borrowed the magazine sometime?
M: No, I wouldn’t mind, if I haven’t thrown that out yet. W: I’d be very appreciated if you can find it. You see, after visiting the museum, I’m really interested in architecture.