Question

--        do you read English newspapers？
--I read 21st Century every day.
A How long     B How often     C How many        D How much

Answer 1

B

疑问词辨析。How long多长，提问时间长短；How often多久一次； How many       多少个； How much多少钱。根据下文，我每天读21世纪。可知上文提问频率，故选B，你多久读一次英文报纸？