does your father go to work?- Five times a week. A. How long B. How soonC. How oft

问题补充：

--- does your father go to work?

--- Five times a week.

A. How long

B. How soon

C. How often

D. How many times

答案：

A. How long

B. How soon

(答案→)C. How often

D. How many times

解析：回答语是表示频率，对频率提问的用how often，多久一次，故选C。