M: Is this your best effort Laura? I've been teaching you for the past 3 months, and this isn't what I expected from you. ,F: I tried my best, and I have a lot of other things going on in my life right now.
(A) M: I am your teacher. I hope you can do better. (B) M: I am really sorry, I did not catch that. Would you slow down, please? (C) M: I know you are my teacher and you have been teaching me for the past six months, but I cannot learn well. (D) M: I am your teacher and I hope you can do better, because I have been teaching you for six months.
A