[单项选择]

[听力原文]
W: Mike, do you have a pet
M: Yes, in fact, we have three pets in my home: two dogs and a cat. My family actually raises dogs for helping blind people.
W: Oh, really How to train the dogs
M: Well, I mean, 12it’s a long process, right... 13we get them when they’re puppies... and so we train them basic... you know, sit, come... really basic things... then, after they’re about two years old, they are sent to a different training school.
W: Wow, that’s great! How many dogs do you train at a time
M: Yeah, just one dog at a time.
W: Oh, wow, that’s cool. 12I just wonder why people keep pets
M: 14I guess the most important thing is companionship’. Specially for the old people, they’d like to have pets to accompany them.
W: All fight. And 12what are some costs associated with keeping a pet
M: 15Food is probably the biggest
A. The training process is very short.
B. Several dogs are trained together at a time.
C. Dogs are not trained until they are two years old.
D. Dogs are trained to learn some basic things when they are puppies.

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