do you go to the movies?Once a week.A. How long B. How much CHow soon D. How of

问题补充：

--- do you go to the movies?

--- Once a week.

A. How long

B. How much

CHow soon

D. How often

答案：

A. How long

B. How much

C. How soon

(答案→)D. How often

解析：考查疑问词：A. how long多长时间B. how much多少，C. how soon 多久D. how often多久一次，从答语Once a week，可知是问多久一次。句意：你多久看一次电影？--一周一次。选D。