American English has changed the centuries. There are several reasons this.
A. over, for
B. for, with
C. in, of
D. during, about
网友回答
(答案→)A. over, for
B. for, with
C. in, of
D. during, about
解析：
试题分析:考查介词用法。over+时间段表示“在…期间，直到…完了(或过后)”比如He stayed over Christmas；the reason for sth意思是“……的原因”， A选项正确。句意：几个世纪以来,美国英语发生了变化。为此有几个方面的原因。