问题补充:
— do you surf the Internet, Kate? — Not often, twice a month.
A. How long
B. How old
C. How often
D. How many times
答案:
A. How long
B. How old
(答案→)C. How often
D. How many times
解析:句意: -Kate,你多久上一次网?-不是经常上,一个月两次。根据Kate的回答twice a month 可知,这里是在询问她上网的频率,故应用how often。how long 多长时间,对一段时间提问;how old 多大,几岁,询问年龄;how many times 多少次,询问次数。故选C。