———____ do you usually go to see your grandparents? ———Once a week

问题描述:

———____ do you usually go to see your grandparents? ———Once a week
A.How far B.How longC.How much D.How often

D 问频率
分析A 问距离; B 问一段时间‘ 多久’ C 问价格
祝你假期愉快!加油!不明白再问!