问题补充:
-- do you visit your grandparents, Jane?
-- Once a month.
A. How soon
B. How long
C. How often
D. How far
答案:
A. How soon
B. How long
(答案→)C. How often
D. How far
解析: A. How soon 多久,多快 B. How long 多长 回答长度C. How often多久一次 回答频率 D. How far 多远 回答距离 “你多久看一次奶奶”“一月一次”