M: Marry you're a teacher, right? How about your sister? ,F: She used to be a nurse, but she worked really hard and became a doctor last year.
(A) M: I envy you are a nurse. This job is very important to patients. (B) M: What subject does your sister teach? English? Chinese? (C) M: I am really sorry, I did not catch that. Would you slow down, please? (D) M: What is your most important job as a doctor?
C