— do you update your micro blog (微博)?—Twice a week.A. How longB. How oftenC. How many time

问题补充：

— do you update your micro blog (微博)?

—Twice a week.

A. How long

B. How often

C. How many times

D. How soon

答案：

A. How long

(答案→)B. How often

C. How many times

D. How soon

解析：四个选项分别表示多长、多久一次，问频率、多少次和多久。根据答语一周两次可知前面问的是频率,选B.