——do you eat vegetables?——Every day.A. How longB. How oftenC. How muchD. how far

问题补充：

——do you eat vegetables?

——Every day.

A. How long

B. How often

C. How much

D. how far

答案：

A. How long

(答案→)B. How often

C. How much

D. how far

解析：句意：你多久吃一次蔬菜？每天。Every day 每天体现了提问是针对频率进行的，A.How long对时间多长进行提问。B.How often对频率进行提问。C.How much对不可数名词进行提问。D.how far对距离进行提问。故选B,多久。