问题补充：
--- do you read English newspapers? ---I read China Daily every day.
A. How long
B. How soon
C. How often
D. How far
答案：
A. How long
B. How soon
(答案→)C. How often
D. How far
解析：How long多长；How soon多久；How often多久一次；How far多远。根据下文，我每天读中国日报。可知上文提问的是频率，故选C。
