问题补充:
--- How often do you phone your family?---?
A. sometime
B. sometimes
C. some time
D. some times
答案:
A. sometime
(答案→)B. sometimes
C. some time
D. some times
解析:本题中sometime为过去的某个时间,和将来的某个时间,sometimes为有时候,some time为一段时间,some times表示一些次数,故能回答how often 只能是B