— does Tim go to a movie? —Twice a month. A. How long B. How soon C. How often

问题补充：

— does Tim go to a movie? —Twice a month.

A. How long B. How soon C. How often

答案：

解析：疑问词辨析。How long多长；How soon多久；How often多久一次。根据答语内容—Twice a month，一月两次.可知上文提问频度，故选C。