- do you practice writing your compositions?Twice a week.A. How muchB. How longC.

问题补充：

--- do you practice writing your compositions?

--- Twice a week.

A. How much

B. How long

C. How often

D. How old

答案：

A. How much

B. How long

(答案→)C. How often

D. How old

解析：此题根据回答（一周两次）可知上文是问频率，所给选项中A. How much多少； B. How long多长； C. How often多久一次； D. How old问年龄多大，所以选C。