Question

【题目】—_________ do you go to the self-service library?

— About twice a month.

A. How longB. How oftenC. How many

Answer 1

【答案】B

【解析】

句意：--你多久去一次自助图书馆？--大约一个月两次。本题考查特殊疑问句。A. How long 多长时间;B. How often多久一次 ; C. How many多少;根据回答About twice a month.可知问得是频率，故选B。