have you been swimming? For five years.A. How many timesB. How longC. How oftenD. How muc

问题补充：

have you been swimming? For five years.

A. How many times

B. How long

C. How often

D. How much

答案：

A. How many times

(答案→)B. How long

C. How often

D. How much

解析：考查情景交际。根据答语“五年了”可知，问的是多长时间了。How many times 对次数提问；How long“多久”；How often“多久一次”；How much“多少钱”。故选B。