A、20 m. B、25 m. C、100 m. D、500 m. B对话中男士提到，他每天让孩子们游泳500米，这相当于游泳池长度的20倍。由此可见，游泳池长度为25米。

W: (14)How are the children in your class doing at sports?
M: (14)I’m very satisfied with their performances. Timmy can cover the 100 meters in 12 seconds. That’s very fast for a kid of his age.
W: He’s not very good at the long jump, is he?
M: He’s not bad. He can jump a distance of over four meters. (15)I think he just prefers running to jumping. Jimmy is very good at the high jump. He can jump over two meters. Again, that’s fine for someone else of his age.
W: Two meters? That means that the high jump bar is above his head! Are any of them good at long-distance running?
M: The longest race we run is the 1 500 meters. A few of the boys and one girl can do it in less than five minutes.
W: How about swimming?
M: They’re OK. (16)I ask them to swim 500 meters each day. That’s 20 lengths of the swimming pool. They’re not very fast, but that’s OK. I just want them to build up their strength and keep in shape. By the way, (17)Kate is very good at diving from a height of 10 meters.
W: Wow, (17)I can’t jump from that height!
M: She started diving from a lower height, but she soon wanted to go higher.
W: It seems that they really enjoy going faster, higher and further.
14. What is the man probably?
15. What can we learn about Timmy?
16. How long is the swimming pool?
17. What can we learn about Kate?