Question

— do you surf the Internet??—Once a week.? A．How B．How old ...

— do you surf the Internet??—Once a week.? A．How B．How old C．How often D．How many times

Answer 1

C

回答语是频率，对频率提问的用how often，故选C。A答案对方式提问，B答案 对年龄提问，D答案对次数提问，故都不能选。