will this goal be achieved?- After .A. How longB. How oftenC. How soonD. How fa

问题补充：

--- will this goal be achieved?

--- After .

A. How long

B. How often

C. How soon

D. How far

答案：

A. How long

B. How often

(答案→)C. How soon

D. How far

解析：考查疑问词。根据答语，在后，可知上文问的是时间。故选C。这个目标多久能够完成？