问题补充：
Working abroad for many years, he has made a big and started a company of his own.
A. difference
B. fortune
C. progress
D. breakthrough
答案：
A. difference
(答案→)B. fortune
C. progress
D. breakthrough
解析：考查名词辨析。A不同，重要作用；B财富，运气；C进步，不可数名词不能和a连用；D突破。句意：在国外工作了那么多年，他已经积累了很大一笔财富，开了自己的公司。make a fortune赚钱，所以选B。
