【单选题】

Questions 1 to 5 are based on an interview.At the end of the interview you will be given 10 seconds to answer each of the following five questions.

Now listen to the interview. According to the officer, a student from other countries have to ______before he can use the National Health Service inBritain.A．register with a university
B．pay the full cost in advance
C．study inBritain at least 6 months
D．be registered on at least 6 courses