-- do you go to a movie?--Twice a week.A. How soonB. How oftenC. How oldD. How much

问题补充：

-- do you go to a movie?

--Twice a week.

A. How soon

B. How often

C. How old

D. How much

答案：

A. How soon

(答案→)B. How often

C. How old

D. How much

解析：疑问词辨析。How soon多久；How often多久一次；How old多大；How much多少。

Twice a week.意思是一周两次，表示频率常用来回答以how often引导的特殊疑问句。故选B。