— I wonder you’ll water this kind of flower.
—Once a week.
A. how often
B. how long
C. how soon
D. how much
网友回答
(答案→)A. how often
B. how long
C. how soon
D. how much
解析：考查疑问词：A. how often多久一次，B. how long多长时间C. how soon多快，D. how much多少，从答语：once a week，可知选A。句意是：我想知道你要多长时间浇一次这种花。--一星期一次。