No matter what you have achieved you have no reasons to others in your field. A. look on

问题补充：

No matter what you have achieved, you have no reasons to others in your field.

A. look on

B. look up to

C. look forward to

D. look down upon

答案：

A. look on

B. look up to

C. look forward to

(答案→)D. look down upon

解析：考查短语辨析。look on 旁观，look up to 不辜负，look forward to 期望，look down upon 轻视，看不起，句意：不管你实现了什么，你都没有理由看不起和你在一个领域的其他人。所以选D。