问题补充：
People all believe that to free trade destroy wealth, benefiting no one in the long run.
A. administrations
B. attempts
C. progress
D. barriers
答案：
A. administrations
B. attempts
C. progress
(答案→)D. barriers
解析：D 考察名词辨析。句义：人们都认为长远的观点来看，自由贸易的障碍破坏财富，对任何人都没有好处。Barrier障碍，administration管理；
