常用于厌氧菌感染创面的溶液有（）。

A.过氧化氢

B.高锰酸钾

C.庆大霉素

D.苯氧乙醇

E.优琐

—   _____you called yesterday evening?  

— My sister. Why?[       ]

A. Who it is that  

B. Who is it that  

C. Who was it that  

D. Who it was that