问题
选择题
–___________ do you visit your grandparents? –Twice a month.
A. How long B. How soon C. How often
答案
答案：C
考查特殊疑问词。根据回答：一月两次，可知用how often 多久一次，选C。
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–___________ do you visit your grandparents? –Twice a month.
A. How long B. How soon C. How often
答案：C
考查特殊疑问词。根据回答：一月两次，可知用how often 多久一次，选C。