---has your brother studied in New York?-For two years.A. How farB. How oftenC. How soo

问题补充：

---has your brother studied in New York?

---For two years.

A. How far

B. How often

C. How soon

D. How long

答案：

A. How far

B. How often

C. How soon

(答案→)D. How long

解析：考查疑问词：A. How far多远，B. How often多久一次，C. How soon 多快D. How long多长时间，根据答语可知是个时间段，它常用来回答以how long引导的特殊疑问句。选D。