－ do you practice dancing every day?－For two hours.A. How long 　　B. How oftenC. How muchD.

问题补充：

－ do you practice dancing every day?

－For two hours.

A. How long

B. How often

C. How much

D. How many

答案：

(答案→)A. How long

B. How often

C. How much

D. How many

解析：A.多长时间 B.多久一次 C.多少 D.多少。句意：—你每天花多长时间练习舞蹈？—两小时。故选A