答案：B
---You should ______ to her for what you did _____her the other day.
---Why should I? It was not my fault.
A.apologize; to;
B. have apologized; to;
C. apologize; with;
D. have apologized; about
关于乳牙的特点，错误的是（）
A.乳牙牙冠颜色比恒牙白
B.牙冠相对短小
C.颈嵴不明显
D.乳前牙根尖向唇侧弯曲
E.颈部缩窄，冠根分明
