单项选择题

Pupil: I apologize for being late this morning. My alarm clock didn"t ring.
Teacher: ______

A.That"s all right. These things often happen.
B.Would you please forgive me I"ll never accept any apologies at all.
C.Thank you. You are really too kind apologizing to me.
D.Never mind. You don"t have to be so polite.