F: Have you handed in your exercise book, Jack? ,M: I'm sorry, I haven't, Miss Smith. I have already finished the exercise, but I can't find my exercise book anywhere now.
(A) F: We are classmates. I will not blame on you, Bob! (B) F: Sam, I am your teacher, tell me the truth! (C) F: As your teacher, I have to know the truth. (D) F: I didn’t hear you. Please could you tell me again?
C