Question

--_________ do you go to a movie?
--Twice a week.

A．How soon

B．How often

C．How old

D．How much

Answer 1

B

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。