do you go shopping Mary?- Twice a week.A. How oftenB. How muchC. How farD. How lon

问题补充：

--- do you go shopping, Mary?

--- Twice a week.

A. How often

B. How much

C. How far

D. How long

答案：

(答案→)A. How often

B. How much

C. How far

D. How long

解析：疑问词辨析。How often多久一次；How much多少钱； How far多远；How long多长。根据答语，一周两次，可知询问的是频率，故用how often来提问。选A。