问题补充:
—do you go to see your uncle?
—Three times a month.
A. How long
B. How many
C. How often
D. How old
答案:
A. How long
B. How many
(答案→)C. How often
D. How old
解析:句意:你多久看望你叔叔一次?。How long多长;How soon多久;How often多久一次;How much多少钱。根据下文,Three times a month,一月三次,可知前文问的是,多久一次,故选。