- did Tara learn ice skating?---For three years.A. How long B. How old C. How often

问题补充：

--- did Tara learn ice skating?

---For three years.

A. How long B. How old C. How often

答案：

解析：根据题干的答语可知，此句询问的是时间，表示多久了。How long表示多久了，常用段时间来回答；how old表示年龄，常用岁数来回答；how often表示多久一次，常用频率副词来回答，故选how long选A。