A、It was made of aluminum. B、It wasn’t large enough. C、It wouldn’t move in the mind. D、It was too heavy to put up. D

M: Hey! How was your trip?
W: Wonderful! I spent most of the time at the museum. I especially liked the new wing. I was amazed to hear the guide explain all the problems they had while building it.
M: Right. I just read an article that went on and on about the cost. Ninety million total, I think.
W: Yeah, the guide mentioned that. You could see they spared no expense.
M: Huh. 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 the 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. Really impressive.
M: That was in the article, too. It is said the original was steel and it weight 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 borrow the magazine sometime?
M: No, I wouldn’t mind, if I haven’t thrown it out yet.
Q. 11. What did the woman think of the new wing of the museum?
Q. 12.How did the man learn about the museum?
Q. 13.According to the woman, what did the paving stones, skylights and mobile have in common?
Q. 14.What was the problem with the original mobile?