—do you play sports?—Every day.A How long B How far C How often

问题补充：

—do you play sports?

—Every day.

A、How long B、How far C、How often

答案：

解析：句意：你多久做一次运动？每天。A多长，可表时间的长短；B多远，表距离；C多久一次，表频率，play sports做运动。结合语境，故选C。