do you play computer?Once a week only on Saturday evening.A. How manyB. How much

问题补充：

--- do you play computer?

--- Once a week, only on Saturday evening.

A. How many

B. How much

C. How often

D. How long

答案：

A. How many

B. How much

(答案→)C. How often

D. How long

解析：How many多少个；How much多少钱； How often多久一次；How long多长。根据答语：一周一次。可知选C。