【正确答案】 D

【答案解析】[听力原文]19-22
M: Welcome to my house!
W: Well, Mr. Robinson, I' m greatly surprised with all the work you've done on your house. (19)How long have you been working on it?
M: (19)I first became engaged in Do-it-yourself work several years ago. You see, my son Paul is disabled since childhood. (21)He's always in the wheelchair and(20)I just had to make some changes for him to the house.
W: Then, what sort of changes did you make?
M: First of all, some practical things to help Paul. Just imagine the problems a disabled person would have in your house. We need a large house with wide corridors so that Paul could move from one room to another as he like.
W: What else did you do?
M: By the time I'd altered everything for Paul, Do-it—yourself work had become a hobby of mine. I really enjoyed doing things with my own hands.
W: What are you working on now?
M: I've just finished the kitchen. (21)Now I'm building an extension so that Paul will have a large room on the ground floor where he can work.
W: I heard that you have got a prize of $10 000 in the Do-it-yourself Competition. How are you going to spend it?
M: (22)I'm hoping to start my oven business soon so that I can convert ordinary houses for disabled people. I think I've become an expert on the subject.
19．How long has Mr. Robinson been working on his house?

在对话开始时，女士为男士房子里的陈设感到惊讶，询问这样做了多长时间，男士回答说I first became engaged in Do-it-yourself work several years ago，由此可见，男士从事DIY工作已经有several years了。

【正确答案】 B

【答案解析】[听力原文]
Why does Mr. Robinson make so many changes to his house?

男士在对话中谈到了自己改装房子的原因，儿子Paul自幼残疾，一直生活在wheelchair上，所以他想make some changes for him to the house，也就是说，他自己改装房子是为了让儿子生活得更方便。

【正确答案】 A

【答案解析】[听力原文]
Which of the following is NOT mentioned about Paul?

男士在谈论儿子的情况时提到He's always in the wheelchair。可见Paul身体残疾，需要靠轮椅行动，但是谈话中并没有提到Paul有精神疾病；在谈话最后男士又提到Now I'm building an extension so that Paul will have a large room on the ground floor where he can work，由此可见Paul在家里工作。综上所述，本题的正确答案为A)。

【正确答案】 C

【答案解析】[听力原文]
What is Mr. Robinson going to do with the prize?

在被问及如何花费所得的奖金时，男士在对话结尾处表示I'm hoping to start my own business soon so that I can convert ordinary houses for disabled people，即开办自己的公司，为残疾人提供房屋改造服务，所以本题的正确答案为C)。