问题补充:
— do you visit your grandparents?
—Twice a month.
A. How many
B. How much
C. How far
D. How often
答案:
A. How many
B. How much
C. How far
(答案→)D. How often
解析:How many多少个;How much多少钱;How far多远;How often多久一次。根据下文,一个月两次。可知上文提问的是频率,故选D,你多久拜访一次你的祖父母?