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