问题补充：
—Lucy,do you go to the park?
—Three times a week.
A. How far
B. How long
C. How often
D. How much
答案：
A. How far
B. How long
(答案→)C. How often
D. How much
解析：A. How far 多远 ，询问距离 B. How long 多长时间， C. How often 多久一次，表示频率 D. How much多少，修饰不可数名词；句意：露西，你通常多久去一次公园。一周三次。故选C
