-- are the Olympic Games held?
--Every four years.
A. How often
B. How soon
C. How long
D. When
网友回答
(答案→)A. How often
B. How soon
C. How long
D. When
解析:考查短语辨析。How often多久一次,表示频率,How soon多久,How long多长,When当什么时候,根据答语内容-Every four years.,可知问句内容为奥运会多久举行一次?故选A