根据对话内容，用方框内所给的句子补全对话。选项中有一项是多余的。

Mary: Hey, Peter. We will graduate in a few months,

Peter. Well, I am not sure yet. It's just what I'm worrying about recently.

Mary: Why do you say so?

Peter: My parents want me to go to the best high school. But I'm not sure.

Mary: But I know you always get good grades,

Peter: I don't know. Maybe because lm arid of the failure Maybe because I don't want to let them down.

Mary: . You should believe in yourself. Just do your best and you won't regret. That's enough.

Peter: OK, Mary, I will. . Thanks a lot.

Mary: No problem, Peter, Good luck.

A. I don't think I can make it. B. Take it easy. C. Why are you so worried? D. I think I am the best. E. Do you have any plans for your future life? F. You are so nice.