we didn't know____for adviceAto ask whom Bwhom to ask Cwhether ask Dif to ask

问题描述:

we didn't know____for advice
Ato ask whom Bwhom to ask Cwhether ask Dif to ask

B 因为ask sb,sb 是宾语,所以who变whom(宾语形式)
whom是特殊疑问词,所以提前