正确答案：
B
解析：
细节题。在介绍封闭性监狱时，录音提到“Most of them are paid for what they do.”，由此可以判断，答案为B项。
【录音原文】
In Britain, if you are found guilty of a crime, you can be sent to prison or be fined or be ordered to do community work such as tidying public places and helping the old. You may also be sent to special centers when you learn special skills like cooking, writing and car maintenance. About 5 percent of the present prisoners are women. Many prisons were built over one hundred years ago. But the government will have built 11 new prisons by next year. There are two sorts of prisons: the open sort and the closed sort. In the closed sort, prisoners are given very little freedom. They spend three to ten hours outside their cells when they exercise, eat, study, learn skills, watch TV and talk to other prisoners. All prisoners are expected to work. Most of them are paid for what they do, whether it is doing maintenance or cooking and cleaning. Prisoners in open prisons are locked up at night, but for the rest of the time, they are free within the prison grounds. They can exercise, have visitors, or study. And some are allowed out of the ground to study or to do community work.
Questions 1 to 3 are based on the conversation you have just heard.
1. What do we know about women prisoners in Britain?
2. In what way are open prisons different from closed prisons?
3. What do we learn about prisoners in Britain?
