Question

---_____must I take this medicine every day? 
--- Three times a day.

A．How long

B．How often

C．How far

D．How

Answer 1

B

回答语是每天三次的意思，表示的是频率，对此提问用how often，故选B，how long对长度提问，how far对路程提问，how对方式提问。