Obama’s success in presidential election proves that the color of one’s skin shouldn’t be

问题补充：

Obama’s success in presidential election proves that the color of one’s skin shouldn’t be ato success.

A. barrier

B. behavior

C. battle

D. bunch

答案：

(答案→)A. barrier

B. behavior

C. battle

D. bunch

解析：

考查名词词义辨析。句意为：奥巴马总统竞选成功证明肤色不应该成为成功的障碍。此处barrier意为“障碍”。