一has your grandpa lived here? 一Since last yearA. How 1ongB. How oftenC. How soonD. How fa

问题补充：

一has your grandpa lived here? 一Since last year．

A. How 1ong

B. How often

C. How soon

D. How far

答案：

(答案→)A. How 1ong

B. How often

C. How soon

D. How far

解析：How 1ong多长；How often 多久一次；How soon多久；How far多远。根据下文，自从去年以来。可知上提问的是时间长度，how soon一般表示将来的时间，故选A。