Question

---_______do you have an art festival in your school?
---Once a year.

A．How long	B．How often
C．How far	D．How soon

Answer 1

B

解析試題分析：句意:你們學校多久舉行一次藝術節？一年一次。A. How long多長時間，B. How often多久一次，C. How far多遠，D. How soon多快。給表示頻率的詞組Once a year.提問要用how often，據句意，故選B。   
考點：考查疑問詞。