题目内容：

Please choose the right sentence to complete the article.

To become a doctor in the United States, students usually attend four years of medical school after they complete college. 1., and must complete a training program as medical residents. (住院实习医生)

These medical residents provide hospitals with services for not much pay. They work under the control of medical teachers and more experienced doctors.2.. They carry out tests. They perform operations(做手术). They do almost everything in the hospital. Some medical residents work one-hundred or more hours in a single week.3.. 

Critics (批评家) of this system say medical residents work too long and do not get enough rest. They say these young doctors may be too tired to perform their medical duties effectively. 4.. Most doctors in training will be limited to eighty-four hours of work each week. They will have work periods of no more than twenty-four hours at one time. They will have ten hours of rest between work periods. They will have one day off every week.

5.. Others, however, said the new rule may interfere with(妨碍) patient care and their own medical education.

A. Medical residents treat(治疗) patients.

B. The government will limit the number of hours of work that residents can work now.

C. Many medical residents welcomed it.

D. They often work for more than thirty-six hours at a time before they can rest.

E. Then they work in hospitals for several years.

F. The government suggests that they should work less