下列哪种情况不能做活髓切断（）

A.乳牙深龋级近髓

B.外伤冠折露髓

C.乳牙去腐未净露髓

D.畸形中央尖折断

E.去尽腐质意外穿髓

—You haven't been to the West Lake, have you?

—_____. But I will go there with my parents this summer vacation.  [ ]

A. No, I haven't    

B. No, I didn't      

C. Yes, I have          

D. yes, I did